WO2017080323A1 - 印刷组合物及其应用 - Google Patents
印刷组合物及其应用 Download PDFInfo
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- WO2017080323A1 WO2017080323A1 PCT/CN2016/100161 CN2016100161W WO2017080323A1 WO 2017080323 A1 WO2017080323 A1 WO 2017080323A1 CN 2016100161 W CN2016100161 W CN 2016100161W WO 2017080323 A1 WO2017080323 A1 WO 2017080323A1
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- C09D5/22—Luminous paints
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- C09K11/881—Chalcogenides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1003—Carbocyclic compounds
- C09K2211/1014—Carbocyclic compounds bridged by heteroatoms, e.g. N, P, Si or B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/185—Metal complexes of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present invention relates to the field of organic electroluminescence technology, and in particular to a printing composition and its use.
- the organic light-emitting diode which is a new generation display technology, is prepared by an evaporation method.
- the preparation process involves a large number of vacuum processes, low material utilization rate, and requires a fine mask (FMM), which is costly and good. The rate is low.
- FMM fine mask
- inkjet printing can produce functional material films in a large area and at low cost.
- inkjet printing has low energy consumption, low water consumption, and environmental protection, and is a production technology with great advantages and potential.
- Another new display technology, quantum dot light-emitting diode (QLED) cannot be evaporated and must be prepared by printing. Therefore, to achieve print display, it is necessary to break through key issues such as printing ink and related printing processes. Viscosity and surface tension are important parameters that affect the printing ink and printing process. A promising printing ink needs to have the proper viscosity and surface tension.
- Organic semiconductor materials have gained widespread attention and significant progress in their use in electronic and optoelectronic devices due to their solution processability.
- Solution processability allows the organic functional material to form a thin film of the functional material in the device by certain coating and printing techniques. Such a technology can effectively reduce the processing cost of electronic and optoelectronic devices, and meet the process requirements of large-area preparation.
- KATEEVA discloses an ester solvent-based organic small molecule material ink for printing OLEDs (US2015044802A1)
- UNIVERSAL DISPLAY CORPORATION discloses A printable organic small molecular material ink based on an aromatic ketone or aromatic ether solvent (US20120205637)
- SEIKO EPSON CORPORATION discloses a printable organic polymer material ink based on a substituted benzene derivative solvent.
- printing inks involving organic functional materials are: CN102408776A, CN103173060A, CN103824959A, CN1180049C, CN102124588B, US2009130296A1, US2014097406A1, and the like.
- Quantum dots are nano-sized semiconductor materials with quantum confinement effects. When stimulated by light or electricity, quantum dots emit fluorescence with specific energy. The color (energy) of fluorescence is determined by the chemical composition and size of quantum dots. Therefore, the control of the size and shape of quantum dots can effectively regulate its electrical and optical properties.
- countries are studying the application of quantum dots in full color, mainly in the display field.
- quantum dots as electroluminescent devices (QLEDs) have been rapidly developed, and device lifetimes have been greatly improved, as in Peng et al., Nature Vol515 96 (2015) and Qian et al., in Nature Photonics Vol 9 259 ( Reported in 2015).
- Nanoco Technologies Ltd. discloses a method for printing a printable ink formulation comprising nanoparticles (CN101878535B).
- Printable nanoparticle inks and corresponding nanoparticle-containing films are obtained by selecting suitable solvents such as toluene and dodecyl selenol; Samsung Electronics discloses a quantum dot ink for inkjet printing. (US8765014B2).
- This ink contains a certain concentration of quantum dot materials, organic solvents and alcohol polymers with high viscosity. additive.
- a quantum dot film is obtained by printing the ink, and a quantum dot electroluminescent device is prepared;
- QD Vision, Inc. discloses a quantum dot ink formulation comprising a host material, a quantum dot Materials and an additive (US2010264371A1).
- a printing composition comprising a functional material and a solvent composition, the solvent composition comprising a first solvent and a second solvent, the first solvent having a boiling point T1 that is less than a boiling point T2 of the second solvent, the first The surface tension ⁇ 1 of the solvent is greater than the surface tension ⁇ 2 of the second solvent, and ⁇ 1 - ⁇ 2 ⁇ 2 dyne/cm.
- the T1 is > 160 °C and the T2-T1 is > 5 °C.
- the first solvent comprises from 50% to 80% by total mass of the solvent composition and the second solvent comprises from 20% to 50% of the total mass of the solvent composition.
- the functional material comprises from 0.3% to 30% of the total mass of the printing composition
- the solvent composition comprises from 70% to 99.7% of the total mass of the printing composition.
- the surface tension of the first solvent and the second solvent ranges from 19 dyne/cm to 50 dyne/cm at 25 °C.
- the first solvent and the second solvent have a viscosity ranging from 1 cPs to 100 cPs at 25 °C.
- the first solvent and the second solvent are each independently selected from the group consisting of an aromatic compound, a heteroaromatic compound, an ester compound, an aliphatic ketone, an aromatic ketone, an aromatic ether, or an aliphatic ether. .
- the first solvent and the second solvent are each a compound having the formula:
- Ar 1 having 5 to 10 carbon atoms, an aromatic ring or heteroaromatic ring, n ⁇ 1, R is a substituent group.
- the Formula I is selected from the following structures:
- R 1 , R 2 , R 3 , R 4 , R 5 , R 6 are each independently selected from: H; D; a linear alkyl group having 1 to 20 C atoms, an alkoxy group or a thioalkoxy group; a branched or cyclic alkyl, alkoxy or thioalkoxy group of 3 to 20 C atoms or a silyl group; a substituted ketone group having 1 to 20 C atoms; having 2 to 20 Alkoxycarbonyl group of C atom; aryloxycarbonyl group having 7 to 20 C atoms, cyano group, carbamoyl group, haloformyl group, formyl group, isocyano group, isocyanate group, thiocyanate group or different Thiocyanate group, hydroxyl group, nitro group, CF 3 , Cl, Br, F; substituted or unsubstituted aromatic or heteroaromatic ring group having 5 to 40 ring atoms; or
- the Ar 1 is selected from the following structures:
- the substituent R is selected from the group consisting of a linear alkyl group having 1 to 20 C atoms, an alkoxy group or a thioalkoxy group; or a branch having 3 to 20 C atoms or a cyclic alkyl, alkoxy or thioalkoxy group or a silyl group; or a substituted ketone group having 1 to 20 C atoms; or an alkoxycarbonyl group having 2 to 20 C atoms, or An aryloxycarbonyl group having 7 to 20 C atoms, a cyano group, a carbamoyl group, a haloformyl group, a formyl group, an isocyano group, an isocyanate group, a thiocyanate group or an isothiocyanate group, a hydroxyl group, a nitrate a group, a CF 3 , Cl, Br, F; or a substituted or unsubstituted aromatic
- the first solvent and the second solvent are each independently selected from the group consisting of: dodecylbenzene, dipentylbenzene, diethylbenzene, trimethylbenzene, tetramethylbenzene, tripentylbenzene, and pentyltoluene.
- the first solvent and the second solvent are each independently selected from the group consisting of alkyl octanoate, alkyl sebacate, alkyl stearate, alkyl benzoate, alkyl phenyl acetate, cinnamon Acid alkyl ester, alkyl oxalate, alkyl maleate, alkanolide, alkyl oleate, dioctyl ether, triethylene glycol dimethyl ether, phorone, 2,6,8-trimethyl-4 - anthrone, acetophenone, benzophenone, butoxybenzene, benzylbutylbenzene or 2,5-dimethoxytoluene.
- the functional material is an inorganic nanomaterial or an organic functional material.
- the inorganic nanomaterial is a luminescent quantum dot material, and the luminescent quantum dot material has an emission wavelength between 380 nm and 2500 nm.
- the inorganic nanomaterial is selected from Group IV, II-VI, II-V, III-V, III-VI, IV-VI, and I-III-VI of the Periodic Table of the Elements.
- the organic functional material is selected from the group consisting of a hole injecting material, a hole transporting material, an electron transporting material, an electron injecting material, an electron blocking material, a hole blocking material, an illuminant, a host material, and an organic dye.
- the organic functional material comprises at least one host material and at least one illuminant material.
- Another object of the invention is to provide the use of the above printing compositions.
- Another object of the present invention is to provide an electronic device.
- the method of preparing the functional film includes the step of applying the printing composition to a substrate.
- the method of coating is selected from the group consisting of: inkjet printing, jet printing, letterpress printing, screen printing, dip coating, spin coating, knife coating, roller printing, torsion roll printing, lithography Printing, flexographic, rotary printing, spray coating, brush coating, pad printing or slit extrusion coating.
- the organic electroluminescent device is selected from the group consisting of a quantum dot light emitting diode, a quantum dot photovoltaic cell, a quantum dot luminescent cell, a quantum dot field effect transistor, a quantum dot luminescence field effect transistor, a quantum dot laser, and a quantum dot.
- Sensor there is Light-emitting diodes, organic photovoltaic cells, organic light-emitting cells, organic field effect transistors, organic light-emitting field effect transistors, organic lasers, organic sensors.
- the above printing composition comprises at least one functional material and at least two organic solvents, wherein at least one of the solvents has a boiling point of ⁇ 160 ° C, and the two organic solvents have a surface tension difference of at least 2 dyne/cm, and a solvent ratio Another solvent has a higher boiling point and a smaller surface tension.
- the two organic solvents have a viscosity of @25 ° C, both in the range of 1 cPs to 100 cPs, and have a surface tension of @25 ° C, both in the range of 19 dyne/cm to 50 dyne/cm, both of which have boiling points. Above 160 °C.
- the above technical solutions also relate to the printing process of the composition and its use in electronic devices, in particular in electroluminescent devices.
- the viscosity and surface tension can be adjusted to a suitable range according to a specific printing method, particularly ink jet printing, to facilitate printing, and a film having a uniform surface (which can eliminate the coffee ring effect) can be formed.
- the organic solvent can be effectively removed by post-treatment, such as heat treatment or vacuum treatment, which is beneficial to ensure the performance of the electronic device.
- the present invention therefore provides an ink for the preparation of high quality functional films, particularly printing inks comprising quantum dots and organic semiconductor materials, providing a technical solution for printed electronic or optoelectronic devices.
- FIG. 1 is a structural view of a light emitting device according to an embodiment of the present invention, in which 101 is a substrate, 102 is an anode, 103 is a hole injection layer (HIL) or a hole transport layer (HTL), and 104 is a light emitting layer (electro A light emitting device) or a light absorbing layer (photovoltaic cell), 105 is an electron injection layer (EIL) or an electron transport layer (ETL), and 106 is a cathode.
- HIL hole injection layer
- HTL hole transport layer
- 104 is a light emitting layer (electro A light emitting device) or a light absorbing layer (photovoltaic cell)
- 105 is an electron injection layer (EIL) or an electron transport layer (ETL)
- 106 is a cathode.
- the printing composition and the printing ink, or ink have the same meaning and are interchangeable.
- the present invention provides a printing composition
- a printing composition comprising at least one functional material and at least two organic solvents (a first solvent and a second solvent), the first solvent having a boiling point T1 smaller than a boiling point T2 of the second solvent, The surface tension ⁇ 1 of the first solvent is greater than the surface tension ⁇ 2 of the second solvent, and ⁇ 1 - ⁇ 2 ⁇ 2dyne/cm, and T1 ⁇ 160 °C.
- Two organic solvents can be evaporated from the solvent system to form a film comprising the functional material.
- At least one of the two organic solvents has a boiling point ⁇ 180 ° C; in certain embodiments, at least one of the two organic solvents has a boiling point ⁇ 200 ° C; In some preferred embodiments, at least one of the two organic solvents has a boiling point ⁇ 225 ° C; in other preferred embodiments, at least one of the two organic solvents has a boiling point ⁇ 250 ° C Or ⁇ 275 ° C; in certain embodiments, at least one of the two organic solvents has a boiling point ⁇ 300 ° C.
- the two organic solvents have boiling points > 160 ° C; in certain preferred embodiments, the two The organic solvent has a boiling point of ⁇ 180 ° C; in other preferred embodiments, the two organic solvents have a boiling point of ⁇ 200 ° C; in other more preferred embodiments, the boiling points of the two organic solvents Both ⁇ 250 ° C or 275 ° C; in certain embodiments, the two organic solvents have boiling points of even ⁇ 300 ° C.
- compositions according to the present invention comprise at least two organic solvents having a surface tension @25 ° C, both in the range of 19 dyne/cm to 50 dyne/cm.
- the surface tension parameters of suitable printing compositions are suitable for a particular substrate and a particular printing method.
- the surface tension of the two organic solvents at 25 ° C is in the range of from about 19 dyne/cm to 50 dyne/cm; in a more preferred embodiment, The surface tension of the two organic solvents at 25 ° C is in the range of about 22 dyne / cm to 35 dyne / cm; in a most preferred embodiment, the surface tension of the two organic solvents at 25 ° C is about 25 dyne /cm to 33dyne/cm range.
- the composition according to the invention has a surface tension at 25 ° C in the range of from about 19 dyne / cm to 50 dyne / cm; more preferably in the range of from 22 dyne / cm to 35 dyne / cm; preferably in 25 dyne /cm to 33dyne/cm range.
- compositions according to the present invention comprise at least two organic solvents having a viscosity of @25 ° C, both in the range of 1 cPs to 100 cPs.
- the at least two organic solvents have a viscosity of less than 100 cps; more preferably less than 50 cps; most preferably from 1.5 to 20 cps.
- the viscosity can also be adjusted by the concentration of the functional material in the composition.
- the solvent system comprising at least two organic solvents according to the present invention facilitates the adjustment of the printing ink to an appropriate range in accordance with the printing method used.
- the composition according to the present invention comprises a functional material in a weight ratio ranging from 0.3% to 30% by weight, preferably from 0.5% to 20% by weight, more preferably from 0.5% to 15% by weight, most preferably 0.5% to 10wt% range.
- the printing composition according to the present invention has a viscosity at 25 ° C in the range of about 1 cps to 100 cps in the above ratio; more preferably in the range of 1 cps to 50 cps; preferably in the range of 1.5 cps to 20 cps. range.
- the viscosity herein refers to the viscosity at ambient temperature at the time of printing, and is usually 15 to 30 ° C, preferably 18 to 28 ° C, more preferably 20 to 25 ° C, and most preferably 23 to 25 ° C.
- the printing compositions so formulated will be particularly suitable for ink jet printing.
- a composition obtained from a solvent system comprising at least two organic solvents satisfying the above boiling point and surface tension parameters and viscosity parameters facilitates formation of a thin film of functional material having uniform thickness and composition properties.
- the printing composition comprises at least two organic solvents, wherein the first solvent accounts for 50% to 80% of the total weight of the solvent, and the second solvent accounts for 20% to 50% of the total weight of the solvent. And the second solvent has a higher boiling point and a smaller surface tension than the first solvent.
- the invention adopts a two-solvent system to prepare a printing ink of a functional material.
- a solvent having good solubility to the functional material is first selected as the first solvent, and good solubility ensures good dispersion and high stability of the functional material in the solution.
- the first solvent acts as the main body of the two-solvent system, and accounts for 50% to 80% of the total amount of the solvent.
- the first solvent accounts for more than 50% of the total amount of the solvent; more preferably, the first solvent accounts for more than 60% of the total amount of the solvent; most preferably, the first solution
- the agent accounts for more than 70% of the total amount of the solvent.
- the first solvent has a higher boiling point, which is beneficial for preventing nozzle clogging of the inkjet print head while ensuring stability of the spraying process.
- a second solvent is selected, the second solvent having a higher boiling point and a smaller surface tension than the first solvent.
- the second solvent accounts for 20% to 50% of the total weight of the solvent.
- the second solvent is less than 50% by weight based on the total weight of the solvent; more preferably, the second solvent is less than 40% by weight based on the total weight of the solvent; most preferably, the second solvent is less than 30% by weight based on the total weight of the solvent.
- the surface of the solution droplets may form a tendency to increase the tension from the edge to the center surface during the drying thereof, thereby driving the surface solution to flow from the edge toward the center.
- Such annular convection is beneficial to the uniform distribution of functional materials in the drying process, can effectively reduce the deposition of functional materials at the edges, weaken the "coffee ring effect", and make the functional film of the dried functional material have good uniformity and flatness.
- the second solvent has a boiling point at least 5 ° C higher than the first solvent, preferably at least 10 ° C higher, more preferably at least 20 ° C higher, more preferably at least 30 ° C higher, and most preferably at least 40 ° C high.
- the difference in surface tension between the two organic solvents is at least 2 dyne/cm; in a preferred embodiment, the difference in surface tension between the two organic solvents is at least 3 dyne/cm; in a more preferred embodiment
- the two organic solvents have a surface tension difference of at least 4 dyne/cm; in a very preferred embodiment, the two organic solvents have a surface tension difference of at least 5 dyne/cm; in a preferred embodiment, two The organic solvent has a surface tension difference of at least 6 dyne/cm.
- the printing composition of the present invention comprises at least one of two organic solvents based on an aromatic or heteroaromatic solvent.
- composition according to the invention comprises at least two organic solvents, and at least one organic solvent has the formula:
- Ar 1 is an aromatic or heteroaryl ring having 5 to 10 carbon atoms, n ⁇ 1, and R is a substituent.
- the organic solvent is represented by the formula (I), wherein Ar 1 is an aromatic or heteroaromatic ring having 5 to 10 carbon atoms.
- An aromatic group refers to a hydrocarbon group containing at least one aromatic ring, including a monocyclic group and a polycyclic ring system.
- a heteroaromatic group refers to a hydrocarbon group (containing a hetero atom) comprising at least one heteroaromatic ring, including a monocyclic group and a polycyclic ring system.
- These polycyclic rings may have two or more rings in which two carbon atoms are shared by two adjacent rings, a fused ring. At least one of these rings of the polycyclic ring is aromatic or heteroaromatic.
- examples of the aromatic group are: benzene, naphthalene, anthracene, phenanthrene, perylene, tetracene, anthracene, benzofluorene, triphenylene, anthracene, anthracene, and derivatives thereof.
- heteroaromatic groups are: furan, benzofuran, thiophene, benzothiophene, pyrrole, pyrazole, triazole, imidazole, oxazole, oxadiazole, thiazole, tetrazole, anthracene, anthracene Oxazole, pyrroloimidazole, pyrrolopyrrole, thienopyrrole, thienothiophene, furopyrrol, furanfuran, thienofuran, benzisoxazole, benzisothiazole, benzimidazole, pyridine, pyrazine, Pyridazine, pyrimidine, triazine, quinoline, isoquinoline, o-diazine, quinoxaline, phenanthridine, carbaidine, quinazoline, quinazolinone, and derivatives thereof.
- the composition comprises an organic solvent having the general formula (I), a more preferred embodiment thereof
- the subclass can be further represented by the following formula:
- Ar 1 in formula (I) is selected from the group consisting of:
- aromatic or heteroaromatic solvents which may be used in the compositions according to the invention are, but are not limited to, p-diisopropylbenzene, pentylbenzene, tetrahydronaphthalene, cyclohexylbenzene, chloronaphthalene, 1,4- Dimethyl naphthalene, 3-isopropyl biphenyl, p-methyl cumene, dipentylbenzene, o-diethylbenzene, m-diethylbenzene, p-diethylbenzene, 1,2,3,4-tetramethylbenzene, 1,2,3,5-tetramethylbenzene, 1,2,4,5-tetramethylbenzene, butylbenzene, dodecylbenzene, 1-methylnaphthalene, 1,2,4-trichlorobenzene, 1,3 -dipropoxybenzene, 4,4-difluorodiphenylmethane,
- the printing composition comprises at least one of two organic solvents.
- An organic solvent for aromatic ketones is an organic solvent for aromatic ketones.
- the solvent of the aromatic ketone is a tetralone, and examples of the tetralone include 1-tetralone and 2-tetralone.
- the tetralone solvent comprises a derivative of 1-tetralone and 2-tetralone, i.e., a tetralone substituted with at least one substituent.
- substituents include an aliphatic group, an aryl group, a heteroaryl group, a halogen, and the like. Specific examples are 2-(phenyl epoxy)tetralone and 6-(methoxy)tetralone.
- the solvent of the aromatic ketone may be selected from the group consisting of acetophenone, propiophenone, benzophenone, and derivatives thereof, such as 4-methylacetophenone, 3-methylbenzene.
- acetophenone propiophenone
- benzophenone and derivatives thereof, such as 4-methylacetophenone, 3-methylbenzene.
- the composition comprises at least one of two organic solvents which are ketone solvents which do not contain aromatic or heteroaromatic groups.
- organic solvents which are ketone solvents which do not contain aromatic or heteroaromatic groups.
- examples of such solvents are: isophorone, 2,6,8-trimethyl-4-indolone, camphor, anthrone.
- the composition comprises at least one of two organic solvents based on an aromatic ether.
- aromatic ether solvents suitable for use in the present invention are: 3-phenoxytoluene, butoxybenzene, benzylbutylbenzene, p-anisaldehyde dimethyl acetal, tetrahydro-2-phenoxy-2H- Pyran, 1,2-dimethoxy-4-(1-propenyl)benzene, 1,4-benzodioxane, 1,3-dipropylbenzene, 2,5-dimethoxytoluene , 4-ethyl ether, 1,2,4-trimethoxybenzene, 4-(1-propenyl)-1,2-dimethoxybenzene, 1,3-dimethoxybenzene, glycidyl Phenyl ether, dibenzyl ether, 4-tert-butyl anisole, trans-p-propenyl anisole, 1,2-dimethoxybenzene, 1-methoxynaphthalene, diphenyl ether, 2-benzene Ox
- the aromatic ether solvent is 3-phenoxytoluene as shown below:
- the composition comprises at least one of two organic solvents based on an ester.
- Possible ester solvents suitable for use in the present invention are: alkyl octanoate, alkyl sebacate, alkyl stearate, alkyl benzoate, alkyl phenyl acetate, alkyl cinnamate, alkyl oxalate, maleic acid. Ester, alkanolactone, alkyl oleate, and the like.
- ester solvent suitable for use in the present invention is octyl octanoate or diethyl sebacate.
- At least one of the two organic solvents included is selected from the group consisting of aliphatic ketones, or aliphatic ethers.
- the organic solvent of the aliphatic ketone may be selected from the group consisting of 2-nonanone, 3-fluorenone, 5-fluorenone, 2-nonanone, 2,5-hexanedione, 2 6,8-trimethyl-4-indolone, phorone, di-n-pentyl ketone, and the like.
- the organic solvent of the aliphatic ether may be selected from the group consisting of pentyl ether, hexyl ether, dioctyl ether, ethylene glycol dibutyl ether, diethylene glycol diethyl ether, and diethylene glycol butyl glycol.
- the solvent system based on two organic solvents can effectively disperse functional materials, that is, as a new dispersing solvent to replace the solvent of the traditionally used dispersing functional materials, such as toluene, xylene, chloroform, chlorobenzene, dichlorobenzene, N-heptane and the like.
- Examples of dual solvent systems suitable for the present invention are, but are not limited to:
- the composition comprising two organic solvents further comprises another organic solvent.
- the other organic solvent include, but are not limited to, methanol, ethanol, 2-methoxyethanol, dichloromethane, chloroform, chlorobenzene, o-dichlorobenzene, tetrahydrofuran, anisole , morpholine, toluene, o-xylene, m-xylene, p-xylene, 1,4 dioxane, acetone, methyl ethyl ketone, 1,2 dichloroethane, 3-phenoxytoluene 1,1,1-trichloroethane, 1,1,2,2-tetrachloroethane, ethyl acetate, butyl acetate, dimethylformamide, dimethylacetamide, dimethyl sulfoxide , tetrahydronaphthalene, decalin, hydrazine and/or mixtures thereof.
- the printing ink may further comprise one or more components such as surface active compounds, lubricants, wetting agents, dispersing agents, hydrophobic agents, adhesives, etc., for adjusting viscosity, film forming properties, and improving adhesion. Wait.
- the printing ink can be deposited into a functional film by a variety of printing or coating techniques including, but not limited to, ink jet printing, Nozzle Printing, typography, screen printing, Dip coating, spin coating, blade coating, roll printing, torsion roll printing, lithography, flexographic printing, rotary printing, spraying, brushing or pad printing, slit type extrusion coating, and the like.
- Preferred printing techniques are ink jet printing, jet printing and gravure printing.
- printing inks suitable for inkjet printing require adjustment of the surface tension, viscosity, and wettability of the ink so that the ink can be ejected through the nozzle at a printing temperature (such as room temperature, 25 ° C) without being sprayed. Drying on the nozzle or clogging the nozzle, or forming a continuous, flat and defect-free film on a particular substrate.
- a printing temperature such as room temperature, 25 ° C
- the printing composition according to the invention comprises at least one functional material.
- a functional material preferably refers to a material having certain photoelectric functions.
- Photoelectric functions include, but are not limited to, hole injection function, hole transport function, electron transport function, electron injection function, electron blocking function, hole blocking function, light emitting function, main body function and light absorbing function.
- the corresponding functional materials are called hole injection material (HIM), hole transport material (HTM), electron transport material (ETM), electron injecting material (EIM), electron blocking material (EBM), hole blocking material (HBM). ), Emitter, Host and Organic Dyes.
- the functional material may be an organic material or an inorganic material.
- the at least one functional material comprised by the printing composition according to the invention is an inorganic nanomaterial.
- the at least one inorganic nanomaterial is an inorganic semiconductor nanoparticle material.
- the inorganic nanomaterial has an average particle diameter in the range of about 1 to 1000 nm. In certain preferred embodiments, the inorganic nanomaterials have an average particle size of from about 1 to 100 nm. In some more preferred embodiments, the inorganic nanomaterials have an average particle size of from about 1 to 20 nm, preferably from 1 to 10 nm.
- the inorganic nanomaterials may be selected from different shapes including, but not limited to, different nanotopography such as spheres, cubes, rods, discs or branched structures, as well as mixtures of particles of various shapes.
- the inorganic nanomaterial is a quantum dot material having a very narrow, monodisperse size distribution, i.e., the size difference between the particles and the particles is very small.
- the deviation of the monodisperse quantum dots in the size of the root mean square is less than 15% rms; more preferably, the deviation of the monodisperse quantum dots in the size of the root mean square is less than 10% rms; optimally, monodisperse Quantum dots have a root mean square deviation of less than 5% rms in size.
- the inorganic nanomaterial is a luminescent material.
- the luminescent inorganic nanomaterial is a quantum dot luminescent material.
- luminescent quantum dots can illuminate at wavelengths between 380 nanometers and 2500 nanometers.
- the luminescent wavelength of a quantum dot having a CdS core is in the range of about 400 nm to 560 nm; the luminescent wavelength of a quantum dot having a CdSe nucleus is in the range of about 490 nm to 620 nm; the luminescent wavelength of a quantum dot having a CdTe core Located in the range of about 620 nm to 680 nm; the quantum wavelength of the quantum dots having the InGaP core is in the range of about 600 nm to 700 nm; the wavelength of the quantum dots having the PbS core is in the range of about 800 nm to 2500 nm; the quantum having the PbSe nucleus
- the illuminating wavelength of the point is in the range of about 1200 nm to 2500 nm; the luminescent wavelength of the quantum dot having the
- the quantum dot material comprises at least one blue light having a peak wavelength of 450 nm to 460 nm, or green light having a peak wavelength of 520 nm to 540 nm, or a peak wavelength of 615 nm to 630 nm. Red light, or a mixture of them.
- the quantum dots contained may be selected from a particular chemical composition, topographical structure, and/or size to achieve light that emits the desired wavelength under electrical stimulation.
- a relationship between the luminescent properties of quantum dots and their chemical composition, morphology, and/or size see Annual Review of Material Sci., 2000, 30, 545-610; Optical Materials Express., 2012, 2, 594-628; Nano Res, 2009, 2, 425-447. The entire contents of the above-listed patent documents are hereby incorporated by reference.
- the narrow particle size distribution of the quantum dots enables quantum dots to have a narrower luminescence spectrum (J. Am. Chem. Soc., 1993, 115, 8706; US 20150108405). Furthermore, depending on the chemical composition and structure employed, the size of the quantum dots needs to be adjusted accordingly within the above-described size range to achieve the luminescent properties of the desired wavelength.
- the luminescent quantum dots are semiconductor nanocrystals.
- semiconductor nanocrystals range in size from about 2 nanometers to about 15 nanometers.
- the size of the quantum dots needs to be adjusted accordingly within the above-described size range to achieve the luminescent properties of the desired wavelength.
- the semiconductor nanocrystal includes at least one semiconductor material, wherein the semiconductor material may be selected from Group IV, II-VI, II-V, III-V, III-VI, IV-VI of the periodic table, Group I-III-VI, Group II-IV-VI, Group II-IV-V binary or multi-component semiconductor compounds or mixtures thereof.
- the semiconductor material include, but are not limited to, Group IV semiconductor compounds composed of elemental Si, Ge, and binary compounds SiC, SiGe; Group II-VI semiconductor compounds, including binary compounds including CdSe, CdTe, CdO, CdS, CdSe, ZnS, ZnSe, ZnTe, ZnO, HgO, HgS, HgSe, HgTe, ternary compounds including CdSeS, CdSeTe, CdSTe, CdZnS, CdZnSe, CdZnTe, CgHgS, CdHgSe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, HgZnS, HgSeSe, and quaternary compounds include CgHgSeS, CdHgSeTe, CgHgSTe, CdZnSeS, CdZnS, C
- the luminescent quantum dots comprise a Group II-VI semiconductor material, preferably selected from the group consisting of CdSe, CdS, CdTe, ZnO, ZnSe, ZnS, ZnTe, HgS, HgSe, HgTe, CdZnSe, and any combination thereof.
- this material is used as a luminescent quantum dot for visible light due to the relatively mature synthesis of CdSe due to CdSe.
- the luminescent quantum dots comprise a III-V semiconductor material, preferably selected from the group consisting of InAs, InP., InN, GaN, InSb, InAsP, InGaAs, GaAs, GaP, GaSb, AlP, AlN, AlAs. , AlSb, CdSeTe, ZnCdSe and any combination thereof.
- the luminescent quantum dots comprise a Group IV-VI semiconductor material, preferably selected from the group consisting of PbSe, PbTe, PbS, PbSnTe, Tl 2 SnTe 5, and any combination thereof.
- the quantum dots are a core-shell structure.
- the core and the shell respectively comprise one or more semiconductor materials, either identically or differently.
- the core of the quantum dot may be selected from the group IV, II-VI, II-V, III-V, III-VI, IV-VI, I-III-VI of the periodic table, Group II-IV-VI, Group II-IV-V binary or multi-element semiconductor compounds.
- quantum dot nuclei include, but are not limited to, ZnO, ZnS, ZnSe, ZnTe, CdO, CdS, CdSe, CdTe, MgS, MgSe, GaAs, GaN, GaP, GaSe, GaSb, HgO, HgS, HgSe, An alloy or mixture of HgTe, InAs, InN, InSb, AlAs, AlN, AlP, AlSb, PbO, PbS, PbSe, PbTe, Ge, Si, and any combination thereof.
- the shell of the quantum dot contains a semiconductor material that is the same as or different from the core.
- Semiconductor materials that can be used for the shell include Group IV, II-VI, II-V, III-V, III-VI, IV-VI, I-III-VI, II-IV-VI of the Periodic Table of the Elements. Group, II-IV-V binary or multi-component semiconductor compounds.
- quantum dot nuclei include, but are not limited to, ZnO, ZnS, ZnSe, ZnTe, CdO, CdS, CdSe, CdTe, MgS, MgSe, GaAs, GaN, GaP, GaSe, GaSb, HgO, HgS, HgSe, An alloy or mixture of HgTe, InAs, InN, InSb, AlAs, AlN, AlP, AlSb, PbO, PbS, PbSe, PbTe, Ge, Si, and any combination thereof.
- the quantum dots having a core-shell structure may include a single layer or a multilayer structure.
- the shell includes one or more semiconductor materials that are the same or different from the core.
- the shell has a thickness of from about 1 to 20 layers.
- the shell has a thickness of about 5 to 10 layers.
- two or more shells are included on the surface of the quantum dot core.
- the semiconductor material used for the shell has a larger band gap than the core.
- shell and core There is a type I semiconductor heterojunction structure.
- the semiconductor material used for the shell has a smaller band gap than the core.
- the semiconductor material used for the shell has an atomic crystal structure that is the same as or close to the core. Such a choice is beneficial to reduce the stress between the core shells and make the quantum dots more stable.
- Examples of suitable luminescent quantum dots using a core-shell structure are:
- Red light CdSe/CdS, CdSe/CdS/ZnS, CdSe/CdZnS, etc.
- Green light CdZnSe/CdZnS, CdSe/ZnS, etc.
- Blue light CdS/CdZnS, CdZnS/ZnS, etc.
- a preferred method of preparing quantum dots is a colloidal growth method.
- the method of preparing monodisperse quantum dots is selected from the group consisting of hot-inject and/or heating-up.
- the preparation method is contained in the document Nano Res, 2009, 2, 425-447; Chem. Mater., 2015, 27(7), pp 2246-2285. The entire contents of the above-listed documents are hereby incorporated by reference.
- the surface of the quantum dot comprises an organic ligand.
- Organic ligands can control the growth process of quantum dots, regulate the appearance of quantum dots and reduce surface defects of quantum dots to improve the luminous efficiency and stability of quantum dots.
- the organic ligand may be selected from the group consisting of pyridine, pyrimidine, furan, amine, alkylphosphine, alkylphosphine oxide, alkylphosphonic acid or alkylphosphinic acid, alkyl mercaptan and the like.
- organic ligands include, but are not limited to, tri-n-octylphosphine, tri-n-octylphosphine oxide, trihydroxypropylphosphine, tributylphosphine, tris(dodecyl)phosphine, dibutyl phosphite , tributyl phosphite, octadecyl phosphite, trilauryl phosphite, tris(dodecyl) phosphite, triisodecyl phosphite, bis(2-ethylhexyl) phosphate, Tris(tridecyl)phosphate, hexadecylamine, oleylamine, octadecylamine, bisoctadecylamine, octadecylamine, bis(2-ethylhexyl)amine, oleyl
- the surface of the quantum dot comprises an inorganic ligand.
- Quantum dots protected by inorganic ligands can be obtained by ligand exchange of organic ligands on the surface of quantum dots. Examples of specific inorganic ligands include, but are not limited to, S 2- , HS - , Se 2- , HSe - , Te 2- , HTe - , TeS 3 2- , OH - , NH 2 - , PO 4 3- , MoO 4 2- , and so on. Examples of such inorganic ligand quantum dots can be found in documents: J. Am. Chem. Soc. 2011, 133, 10612-10620; ACS Nano, 2014, 9, 9388-9402. The entire contents of the above-listed documents are hereby incorporated by reference.
- the quantum dot surface has one or more of the same or different ligands.
- the luminescence spectrum exhibited by the monodisperse quantum dots has a symmetrical peak shape and a narrow half width.
- the better the monodispersity of quantum dots the more symmetric the luminescence peaks are and the narrower the half-width.
- the quantum dot has a half-width of light emission of less than 70 nanometers; more preferably, the quantum half-width of the quantum dot is less than 40 nanometers; most preferably, the quantum half-width of the quantum dot is smaller than 30 nanometers.
- the quantum dots have a luminescence quantum efficiency of greater than 10%, preferably greater than 50%, more preferably greater than 60%, and most preferably greater than 70%.
- the luminescent semiconductor nanocrystals are nanorods.
- the properties of nanorods are different from those of spherical nanocrystals.
- the luminescence of the nanorods is polarized along the long rod axis, while the luminescence of the spherical grains is unpolarized (see Woggon et al, Nano Lett., 2003, 3, p509).
- Nanorods have excellent optical gain characteristics, making them possible to use as laser gain materials (see Banin et al. Adv. Mater. 2002, 14, p317).
- the luminescence of the nanorods can be reversibly turned on and off under the control of an external electric field (see Banin et al, Nano Lett.
- nanorods can be preferentially incorporated into the device of the present invention under certain circumstances.
- preparation of the semiconductor nanorods are, for example, WO03097904A1, US2008188063A1, US2009053522A1, and KR20050121443A, the entire contents of each of which are hereby incorporated by reference.
- the inorganic nanomaterial is a perovskite nanoparticle material, in particular a luminescent perovskite nanoparticle material.
- the perovskite nanoparticle material has the structural formula of AMX 3 wherein A may be selected from an organic amine or an alkali metal cation, M may be selected from a metal cation, and X may be selected from an oxygen or a halogen anion.
- CsPbCl 3 CsPb(Cl/Br) 3 , CsPbBr 3 , CsPb(I/Br) 3 , CsPbI 3 , CH 3 NH 3 PbCl 3 , CH 3 NH 3 Pb (C1/Br 3 , CH 3 NH 3 PbBr 3 , CH 3 NH 3 Pb(I/Br) 3 , CH 3 NH 3 PbI 3 and the like.
- Literature on perovskite nanoparticle materials is NanoLett., 2015, 15, 3692-3696; ACS Nano, 2015, 9, 4533-4542; Angewandte Chemie, 2015, 127(19): 5785-5788; Nano Lett., 2015, 15(4), pp2640-2644; Adv. Optical Mater. 2014, 2, 670-678; The Journal of Physical Chemistry Letters, 2015, 6(3): 446-450; J. Mater. Chem. A, 2015, 3, 9187-9193; Inorg. Chem. 2015, 54, 740-745; RSC Adv., 2014, 4, 55908-55911; J. Am. Chem.
- the inorganic nanomaterial is a metal nanoparticle material.
- Particularly preferred are luminescent metal nanoparticle materials.
- the metal nanoparticles include, but are not limited to, chromium (Cr), molybdenum (Mo), tungsten (W), ruthenium (Ru), rhenium (Rh), nickel (Ni), silver (Ag), copper (Cu Nanoparticles of zinc (Zn), palladium (Pd), gold (Au), hungry (Os), ruthenium (Re), iridium (Ir), and platinum (Pt).
- the types, morphologies and synthetic methods of common metal nanoparticles can be found in: Angew. Chem. Int. Ed. 2009, 48, 60-103; Angew. Chem. Int. Ed. 2012, 51, 7656-7673; Adv. Mater. 2003, 15, No. 5, 353-389; Adv. Mater. 2010, 22, 1781-1804; Small. 2008, 3, 310-325; Angew. Chem. Int. Ed. 2008, 47, 2-
- the disclosures of the above-cited documents are hereby incorporated by
- the inorganic nanomaterial has charge transport properties.
- the inorganic nanomaterial has electron transport capabilities.
- such inorganic nanomaterials are selected from the group consisting of n-type semiconductor materials.
- n-type inorganic semiconductor materials include, but are not limited to, metal chalcogen compounds, metal phosphorus group compounds, or elemental semiconductors such as metal oxides, metal sulfides, metal selenides, metal tellurides, metal nitrides, Metal phosphide, or metal arsenide.
- the preferred n-type inorganic semiconductor material is selected from the group consisting of ZnO, ZnS, ZnSe, TiO 2 , ZnTe, GaN, GaP, A1N, CdSe, CdS, CdTe, CdZnSe, and any combination thereof.
- the inorganic nanomaterial has a hole transporting ability.
- such inorganic nanomaterials are selected from p-type semiconductor materials.
- the inorganic p-type semiconductor material may be selected from the group consisting of NiOx, WOx, MoOx, RuOx, VOx, CuOx, and any combination thereof.
- the printing ink according to the present invention comprises at least two and two or more inorganic nanomaterials.
- composition according to the invention comprises at least one organic functional material.
- the organic functional materials include, but are not limited to, holes (also called holes) injection or transport materials (HIM/HTM), hole blocking materials (HBM), electron injection or transport materials (EIM/ETM), Electron barrier material (EBM), organic host material (Host), singlet illuminant (fluorescent illuminant), thermally activated delayed fluorescent luminescent material (TADF), triplet illuminant (phosphorescent illuminant), especially luminescent organic metal Complex, organic dye.
- holes also called holes injection or transport materials
- HBM hole blocking materials
- EIM/ETM electron injection or transport materials
- EBM Electron barrier material
- organic host material Host
- singlet illuminant fluorescent illuminant
- TADF thermally activated delayed fluorescent luminescent material
- phosphorescent illuminant especially luminescent organic metal Complex, organic dye.
- Various organic functional materials are described in detail in, for example, WO2010135519A1, US20090134784A1, and
- the organic functional material has a solubility in the organic solvent according to the invention of at least 0.2% by weight, preferably at least 0.3% by weight, more preferably at least 0.6% by weight, still more preferably at least 1.0% by weight, It is preferably at least 1.5% by weight.
- the organic functional material may be a small molecule and a high polymer material.
- the small molecule organic material means a material having a molecular weight of at most 4000 g/mol, and the material having a molecular weight higher than 4000 g/mol is collectively referred to as a high polymer.
- the printing composition according to the invention comprises a functional material which is an organic small molecule material.
- the printing composition according to the present invention wherein the organic functional material comprises at least one host material and at least one illuminant.
- the organic functional material comprises a host material and a singlet emitter.
- the organic functional material comprises a host material and a triplet emitter.
- the organic functional material comprises a host material and a thermally activated delayed fluorescent luminescent material.
- the organic functional material comprises a hole transporting material (HTM), and more preferably, the HTM comprises a crosslinkable group.
- HTM hole transporting material
- organic small molecule functional materials suitable for the preferred embodiment are described in some detail below (but are not limited thereto).
- Suitable organic HIM/HTM materials may optionally comprise compounds having the following structural units: phthalocyanine, porphyrin, amine, aromatic amine, biphenyl triarylamine, thiophene, thiophene such as dithienothiophene and thiophene, pyrrole, aniline , carbazole, azide and azepine and their derivatives.
- suitable HIMs also include fluorocarbon-containing polymers, conductively doped polymers, conductive polymers such as PEDOT:PSS.
- An electron blocking layer is used to block electrons from adjacent functional layers, particularly the luminescent layer.
- the electron blocking material (EBM) of the electron blocking layer (EBL) requires a higher LUMO than an adjacent functional layer such as a light emitting layer.
- the HBM has a ratio of adjacent luminescent layers Larger excited state energy levels, such as singlet or triplet states, depend on the illuminant, while EBM has a hole transport function. HIM/HTM materials that typically have high LUMO levels can be used as EBMs.
- cyclic aromatic amine-derived compounds useful as HIM, HTM or EBM include, but are not limited to, the following general structures:
- Each of Ar 1 to Ar 9 may be independently selected from the group consisting of a cyclic aromatic hydrocarbon compound such as benzene, biphenyl, triphenyl, benzo, naphthalene, anthracene, phenalrene, phenanthrene, anthracene, anthracene, fluorene, anthracene, anthracene; Heterocyclic compounds such as dibenzothiophene, dibenzofuran, furan, thiophene, benzofuran, benzothiophene, oxazole, pyrazole, imidazole, triazole, isoxazole, thiazole, oxadiazole, evil Triazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, acesulfazine, oxadiazine, hydrazine
- Ar 1 to Ar 9 may be independently selected from the group consisting of:
- n is an integer from 1 to 20; X 1 to X 8 are CH or N; and Ar 1 is as defined above.
- metal complexes that can be used as HTM or HIM include, but are not limited to, the following general structures:
- M is a metal having an atomic weight greater than 40
- (Y 1 -Y 2 ) is a bidentate ligand, Y 1 and Y 2 are independently selected from C, N, O, P and S; L is an ancillary ligand; m is a
- (Y 1 -Y 2 ) is a 2-phenylpyridine derivative.
- (Y 1 -Y 2 ) is a carbene ligand.
- M is selected from Ir, Pt, Os, and Zn.
- the HOMO of the metal complex is greater than -5.5 eV (relative to the vacuum level).
- the example of the triplet host material is not particularly limited, and any metal complex or organic compound may be used as the host as long as its triplet energy is higher than that of the illuminant, particularly the triplet illuminant or the phosphorescent illuminant.
- metal complexes that can be used as the triplet host include, but are not limited to, the following general structure:
- M is a metal
- (Y 3 -Y 4 ) is a bidentate ligand, Y 3 and Y 4 are independently selected from C, N, O, P, and S
- L is an ancillary ligand
- m is an integer , the value from 1 to the maximum coordination number of this metal
- m + n is the maximum coordination number of this metal.
- the metal complex that can be used as the triplet host has the following form:
- (O-N) is a two-tooth ligand in which the metal coordinates with the O and N atoms.
- M is optional for Ir and Pt.
- Examples of the organic compound which can be used as the host of the triplet state are selected from compounds containing a cyclic aromatic hydrocarbon group such as benzene, biphenyl, triphenyl, benzo, anthracene; compounds containing an aromatic heterocyclic group such as dibenzothiophene, Dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, carbazole, pyridinium, pyrrole dipyridine, pyrazole, imidazole, three Azole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, thiazide, dioxazin, hydrazine Anthracen
- Atoms, chain structural units and aliphatic ring groups wherein each of Ar may be further substituted, and the substituent may be hydrogen, alkyl, alkoxy, amino, alkene, alkyne, aralkyl, heteroalkyl, aryl or heteroaryl.
- the triplet host material can be selected from compounds comprising at least one of the following groups:
- R 1 -R 7 may be independently of one another selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkene, alkyne, aralkyl, heteroalkyl, aryl and heteroaryl, when they are aromatic Or a heteroaryl group, which has the same meaning as Ar 1 and Ar 2 described above; n is an integer from 0 to 20; X 1 -X 8 is selected from CH or N; and X 9 is selected from CR 1 R 2 or NR. 1 .
- the example of the singlet host material is not particularly limited, and any organic compound may be used as the host as long as its singlet energy is higher than that of the illuminant, particularly the singlet illuminant or the luminescent illuminant.
- Examples of the organic compound used as the singlet host material may be selected from the group consisting of a cyclic aromatic compound such as benzene, biphenyl, triphenyl, benzo, naphthalene, anthracene, anthracene, phenanthrene, anthracene, anthracene, fluorene, fluorene, fluorene, An aromatic heterocyclic compound such as dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, oxazole, carbazole, pyridine Anthraquinone, pyrrole dipyridine, pyrazole, imidazole, triazole, isoxazole, thiazole, oxadiazole, triazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrim
- the singlet host material can be selected from compounds comprising at least one of the following groups:
- R 1 may be independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkene, alkyne, aralkyl, heteroalkyl, aryl and heteroaryl;
- Ar 1 is aryl or a heteroaryl group having the same meaning as Ar 1 as defined in the above HTM;
- n is an integer from 0 to 20;
- X 1 -X 8 is selected from CH or N;
- X 9 and X 10 are selected from CR 1 R 2 or NR 1 .
- Singlet emitters tend to have longer conjugated pi-electron systems.
- styrylamine and its derivatives disclosed in JP 2913116 B and WO 2001021729 A1
- indenoindenes and derivatives thereof disclosed in WO 2008/006449 and WO 2007/140847.
- the singlet emitter can be selected from the group consisting of monostyrylamine, dibasic styrylamine, ternary styrylamine, quaternary styrylamine, styrene phosphine, styrene ether and aromatic amine.
- a monostyrylamine refers to a compound comprising an unsubstituted or substituted styryl group and at least one amine, preferably an aromatic amine.
- a dibasic styrylamine refers to a compound comprising two unsubstituted or substituted styryl groups and at least one amine, preferably an aromatic amine.
- a ternary styrylamine refers to a compound comprising three unsubstituted or substituted styryl groups and at least one amine, preferably an aromatic amine.
- a quaternary styrylamine refers to a compound comprising four unsubstituted or substituted styryl groups and at least one amine, preferably an aromatic amine.
- a preferred styrene is stilbene, which may be further substituted.
- the corresponding phosphines and ethers are defined similarly to amines.
- An arylamine or an aromatic amine refers to a compound comprising three unsubstituted or substituted aromatic ring or heterocyclic systems directly bonded to a nitrogen. At least one of these aromatic or heterocyclic ring systems is preferably selected from the fused ring system and preferably has at least 14 aromatic ring atoms.
- Preferred examples thereof are aromatic decylamine, aromatic quinone diamine, aromatic decylamine, aromatic quinone diamine, aromatic thiamine and aromatic quinone diamine.
- An aromatic amide refers to a compound in which a diaryl arylamine group is attached directly to the oxime, preferably at the position of 9.
- An aromatic quinone diamine refers to a compound in which two diaryl arylamine groups are attached directly to the oxime, preferably at the 9,10 position.
- the definitions of aromatic decylamine, aromatic quinone diamine, aromatic thiamine and aromatic quinone diamine are similar, wherein the diaryl aryl group is preferably bonded to the 1 or 1,6 position of hydrazine.
- Examples of singlet emitters based on vinylamines and arylamines are also preferred examples and can be found in the following patent documents: WO 2006/000388, WO 2006/058737, WO 2006/000389, WO 2007/065549, WO 2007 /115610, US 7250532 B2, DE 102005058557 A1, CN 1583691 A, JP 08053397 A, US 6251531 B1, US 2006/210830 A, EP 1957606 A1 and US 2008/0113101 A1, the entire contents of which are hereby incorporated by reference. This article is incorporated herein by reference.
- Further preferred singlet emitters can be selected from indenoindole-amines and indenofluorene-diamines, as disclosed in WO 2006/122630, benzoindoloindole-amines and benzoindenoindole-diamines , as disclosed in WO 2008/006449, dibenzoindolo-amine and dibenzoindeno-diamine, as disclosed in WO 2007/140847.
- polycyclic aromatic hydrocarbon compounds in particular derivatives of the following compounds: for example, 9,10-bis(2-naphthoquinone), naphthalene, tetraphenyl, xanthene, phenanthrene , ⁇ (such as 2,5,8,11-tetra-t-butyl fluorene), anthracene, phenylene such as (4,4'-bis(9-ethyl-3-carbazolevinyl)-1 , 1 '-biphenyl), indenyl hydrazine, decacycloolefin, hexacene benzene, anthracene, spirobifluorene, aryl hydrazine (such as US20060222886), arylene vinyl (such as US5121029, US5130603), cyclopentane Alkene such as tetraphenylcyclopentadiene, rub
- TDF Thermally activated delayed fluorescent luminescent material
- the thermally activated delayed fluorescent luminescent material is a third generation organic luminescent material developed after organic fluorescent materials and organic phosphorescent materials.
- Such materials generally have a small singlet-triplet energy level difference ( ⁇ E st ), and triplet excitons can be converted into singlet exciton luminescence by inter-system crossing. This makes full use of the singlet excitons and triplet excitons formed under electrical excitation. The quantum efficiency in the device can reach 100%.
- ⁇ E st singlet-triplet energy level difference
- the TADF material needs to have a small singlet-triplet energy level difference, typically ⁇ E st ⁇ 0.3eV, preferably ⁇ E st ⁇ 0.2eV, more preferably ⁇ E st ⁇ 0.1eV, and most preferably ⁇ E st ⁇ 0.05eV.
- TADF has better fluorescence quantum efficiency.
- TADF luminescent materials can be found in the following patent documents: CN103483332(A), TW201309696(A), TW201309778(A), TW201343874(A), TW201350558(A), US20120217869(A1), WO2013133359(A1), WO2013154064( A1), Adachi, et.al. Adv. Mater., 21, 2009, 4802, Adachi, et. al. Appl. Phys. Lett., 98, 2011, 083302, Adachi, et. al. Appl. Phys. Lett ., 101, 2012, 093306, Adachi, et. al. Chem.
- TADF luminescent materials are listed in the table below:
- triplet emitters are also known as phosphorescent emitters.
- triplet emitters are of the general formula M (L) n of the metal complex, wherein M is a metal atom, when L at each occurrence may be the same or different, is an organic ligand It is bonded to the metal atom M by one or more positional bonding or coordination, and n is an integer greater than 1, preferably 1, 2, 3, 4, 5 or 6.
- these metal complexes are coupled to a polymer by one or more positions, preferably by an organic ligand.
- the metal atom M is selected from a transition metal element or a lanthanide or a lanthanide element, preferably Ir, Pt, Pd, Au, Rh, Ru, Os, Sm, Eu, Gd, Tb, Dy Re, Cu or Ag, with Os, Ir, Ru, Rh, Re, Pd or Pt being particularly preferred.
- the triplet emitter comprises a chelating ligand, ie a ligand, coordinated to the metal by at least two bonding sites, with particular preference being given to the triplet emitter comprising two or three identical or different pairs Tooth or multidentate ligand.
- Chelating ligands are beneficial for increasing the stability of metal complexes.
- Examples of the organic ligand may be selected from a phenylpyridine derivative, a 7,8-benzoquinoline derivative, a 2(2-thienyl)pyridine derivative, a 2(1-naphthyl)pyridine derivative, or a 2 benzene.
- a quinolinol derivative All of these organic ligands may be substituted, for example by fluorine or trifluoromethyl.
- the ancillary ligand may preferably be selected from the group consisting of acetone acetate or picric acid.
- the metal complex that can be used as the triplet emitter has the following form:
- M is a metal selected from transition metal elements or lanthanides or actinides
- Ar 1 may be the same or different at each occurrence, and is a cyclic group containing at least one donor atom, that is, an atom having a lone pair of electrons, such as nitrogen or phosphorus, through which a cyclic group is coordinated to a metal.
- Ar 2 may be the same or different each time it appears, is a cyclic group containing at least one C atom through which a cyclic group is attached to the metal; Ar 1 and Ar 2 are bonded by a covalent bond Together, each may carry one or more substituent groups which may also be joined together by a substituent group; each occurrence of L may be the same or different and is an ancillary ligand, preferably a bidentate chelate ligand Preferred is a monoanionic bidentate chelate ligand; m is 1, 2 or 3, preferably 2 or 3, particularly preferably 3; n is 0, 1, or 2, preferably 0 or 1, Particularly preferred is 0;
- triplet emitters Some examples of suitable triplet emitters are listed in the table below:
- the functional material comprised by the composition according to the invention is a polymeric material.
- organic small molecule functional materials described above including HIM, HTM, ETM, EIM, Host, fluorescent illuminants, phosphorescent emitters, and TADF can all be included as a repeating unit in a high polymer.
- the high polymer suitable for the present invention is a conjugated high polymer.
- conjugated polymers have the following general formula:
- A can independently select the same or different structural units when appearing multiple times
- B ⁇ -conjugated structural unit having a large energy gap, also called a Backbone Unit, selected from a monocyclic or polycyclic aryl or heteroaryl group, and the preferred unit form is benzene, bis. Biphenylene, naphthalene, anthracene, phenanthrene, dihydrophenanthrene, 9,10-dihydrophenanthrene, anthracene, diterpene, spirobifluorene, p-phenylacetylene, ruthenium, fluorene, dibenzo-indole And ⁇ , ⁇ and naphthalene and their derivatives.
- a Backbone Unit selected from a monocyclic or polycyclic aryl or heteroaryl group, and the preferred unit form is benzene, bis. Biphenylene, naphthalene, anthracene, phenanthrene, dihydrophenanthrene, 9,10-dihydrophenanthrene, anth
- a ⁇ -conjugated structural unit having a small energy gap may be selected from hole injection or transport materials (HIM/HTM) containing the above-described functions according to different functional requirements. , electron injection or transport material (EIM/ETM), host material (Host), singlet illuminant (fluorescent illuminant), structural unit of heavy illuminant (phosphorescent illuminant).
- HIM/HTM hole injection or transport materials
- EIM/ETM electron injection or transport material
- host material Host
- singlet illuminant fluorescent illuminant
- structural unit of heavy illuminant phosphorescent illuminant
- the functional material comprised by the composition according to the invention is a high polymer HTM.
- the high polymer HTM material is a homopolymer, and the preferred homopolymer is selected from the group consisting of polythiophene, polypyrrole, polyaniline, polybiphenyl triarylamine, polyvinyl carbazole and their derivatives. Object.
- the high polymer HTM material is a conjugated copolymer represented by Chemical Formula 1, wherein
- A a functional group having a hole transporting ability, which may be the same or differently selected from the structural unit containing the hole injection or transport material (HIM/HTM) described above; in a preferred embodiment, A Selected from amines, biphenyls Amines, thiophenes, and thiophenes such as dithienothiophene and thiophene, pyrrole, aniline, carbazole, indenocarbazole, arsenazo, pentacene, phthalocyanine, porphyrin and derivatives thereof.
- HIM/HTM hole injection or transport material
- R each independently of each other is hydrogen, a linear alkyl group having 1 to 20 C atoms, an alkoxy group or a thioalkoxy group, or a branched or cyclic alkyl group having 3 to 20 C atoms.
- r 0, 1, 2, 3 or 4;
- s 0, 1, 2, 3, 4 or 5;
- Another preferred class of organic functional materials are polymers having electron transport capabilities, including conjugated high polymers and non-conjugated high polymers.
- the preferred high polymer ETM material is a homopolymer, and the preferred homopolymer is selected from the group consisting of polyphenanthrene, polyphenanthroline, polyfluorene, polyspiroquinone, polyfluorene and their derivatives.
- the preferred high polymer ETM material is a conjugated copolymer represented by Chemical Formula 1, wherein A may independently select the same or different forms in multiple occurrences:
- A a functional group having electron transporting ability, preferably selected from the group consisting of tris(8-hydroxyquinoline)aluminum (AlQ3), benzene, diphenylene, naphthalene, anthracene, phenanthrene, Dihydrophenanthrene, anthracene, diterpene, snail , p-phenylacetylene, anthracene, anthracene, 9,10-Dihydrophenanthrene, phenazine, phenanthroline, ruthenium, fluorene, dibenzo-indenoindole, indenylnaphthalene, benzindene and their derivatives Object
- AlQ3 tris(8-hydroxyquinoline)aluminum
- the functional material comprised by the composition according to the invention is a luminescent polymer.
- the luminescent polymer is a conjugated high polymer having the following general formula:
- a functional group having a hole or electron transporting ability which may be selected from structural units containing the above-described hole injecting or transporting material (HIM/HTM), or electron injecting or transporting material (EIM/ETM).
- A2 a group having a light-emitting function, which may be selected from structural units including the above-described singlet light emitter (fluorescent light emitter) and heavy light emitter (phosphorescent light emitter).
- luminescent polymers are disclosed in the following patent applications: WO2007043495, WO2006118345, WO2006114364, WO2006062226, WO2006052457, WO2005104264, WO2005056633, WO2005033174, WO2004113412, WO2004041901, WO2003099901, WO2003051092, WO2003020790, WO2003020790, US2020040076853, US2020040002576, US2007208567, US2005962631, EP 201345477, EP 2001 344 788, DE 10 2004 020 298, the entire disclosure of which is incorporated herein by reference.
- the high polymer suitable for the present invention is a non-conjugated high polymer.
- This can be that all functional groups are on the side chain and the backbone is a non-conjugated high polymer.
- Some of such non-conjugated high polymers useful as phosphorescent or phosphorescent materials are disclosed in U.S. Patent Nos. 7,250,226, B2, JP 2007 059 939 A, JP 2007 211 243 A2, and JP 2007 1975 074 A2, each of which is incorporated herein by reference.
- Patent applications such as JP2005108556, JP2005285661, and JP2003338375 are disclosed.
- the non-conjugated high polymer may be a high polymer, and the functional units conjugated to the main chain are linked by non-conjugated linking units.
- high polymers are in DE102009023154.4 and DE102009023156.0. There is publicity in it. The entire contents of the above patent documents are hereby incorporated by reference.
- the present invention also relates to a method of preparing a film comprising a functional material by a method of printing or coating, wherein any one of the compositions described above is applied to a substrate by printing or coating, wherein printing or
- the coating method can be selected from, but not limited to, inkjet printing, Nozzle Printing, typography, screen printing, dip coating, spin coating, blade coating, and roll coating. Tube printing, twist roll printing, lithography, flexographic printing, rotary printing, spraying, brushing or pad printing, slit type extrusion coating, etc.
- the film comprising the functional material is prepared by a method of ink jet printing.
- Inkjet printers that can be used to print inks in accordance with the present invention are commercially available printers and include drop-on-demand printheads. These printers are available from Fujifilm Dimatix (Lebanon, NH), Trident International (Brookfield, Conn.), Epson (Torrance, Calif), Hitachi Data systems Corporation (Santa Clara, Calif), Xaar PLC (Cambridge, United Kingdom), and Idanit. Technologies, Limited (Rishon Le Zion, Isreal) purchased.
- the present invention can be printed using Dimatix Materials Printer DMP-3000 (Fujifilm).
- the invention further relates to an electronic device comprising one or more functional films, wherein at least one of the functional films is prepared by means of a printing ink composition according to the invention, in particular by printing or coating.
- Suitable electronic devices include, but are not limited to, quantum dot light emitting diodes (QLEDs), quantum dot photovoltaic cells (QPVs), quantum dot luminescent cells (QLEEC), quantum dot field effect transistors (QFETs), quantum dot luminescence field effect transistors, quantum dots.
- QLEDs quantum dot light emitting diodes
- QPVs quantum dot photovoltaic cells
- QLEEC quantum dot luminescent cells
- QFETs quantum dot field effect transistors
- Quant dot luminescence field effect transistors quantum dots.
- the electronic device described above is an electroluminescent device or a photovoltaic cell, as shown in FIG. 1, comprising a substrate (101), an anode (102), at least one luminescent layer or light absorbing. Layer (104), a cathode (106).
- the following is only for the description of the electroluminescent device.
- the substrate (101) may be opaque or transparent.
- a transparent substrate can be used to make a transparent light-emitting component. See, for example, Bulovic et al. Nature 1996, 380, p29, and Gu et al, Appl. Phys. Lett. 1996, 68, p2606.
- the substrate can be rigid or elastic.
- the substrate can be plastic, metal, semiconductor wafer or glass.
- the substrate has a smooth surface. Substrates without surface defects are a particularly desirable choice.
- the substrate may be selected from polymeric films or plastics having a glass transition temperature Tg of 150 ° C or higher, preferably more than 200 ° C, more preferably more than 250 ° C, and most preferably more than 300 ° C. Examples of suitable substrates are poly(ethylene terephthalate) (PET) and polyethylene glycol (2,6-naphthalene) (PEN).
- the anode (102) may comprise a conductive metal or metal oxide, or a conductive polymer.
- the anode can easily inject holes into the HIL or HTL or the luminescent layer.
- the absolute value of the difference between the work function of the anode and the HOMO level or the valence band level of the p-type semiconductor material as the HIL or HTL is less than 0.5 eV, preferably less than 0.3 eV. 0.2eV.
- the anode material include, but are not limited to, Al, Cu, Au, Ag, Mg, Fe, Co, Ni, Mn, Pd, Pt, ITO, aluminum-doped zinc oxide (AZO), and the like.
- anode material can be deposited using any suitable technique, such as a suitable physical vapor deposition process, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
- a suitable physical vapor deposition process including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
- the anode is patterned.
- Patterned ITO conductive substrates are commercially available and can be used to prepare devices in accordance with the present invention.
- the cathode (106) can comprise a conductive metal or metal oxide.
- the cathode can easily inject electrons into the EIL or ETL or directly into the luminescent layer.
- the absolute value of the difference between the work function of the cathode and the LUMO level or the conduction band level of the n-type semiconductor material as EIL or ETL or HBL is less than 0.5 eV, preferably less than 0.3 eV. It is less than 0.2eV.
- all materials which can be used as the cathode of the OLED are possible as the cathode material of the device of the present invention.
- cathode material examples include, but are not limited to, Al, Au, Ag, Ca, Ba, Mg, LiF/Al, MgAg alloy, BaF2/Al, Cu, Fe, Co, Ni, Mn, Pd, Pt, ITO, and the like.
- the cathode material can be deposited using any suitable technique, such as a suitable physical vapor deposition process, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
- the luminescent layer (104) includes at least one luminescent functional material having a thickness between 2 nm and 200 nm.
- the luminescent layer is prepared by printing the printing ink of the invention, wherein the printing ink comprises at least one luminescent functional material as described above, in particular Quantum dots or organic functional materials.
- the light emitting device further comprises a hole injection layer (HIL) or hole transport layer (HTL) (103) containing the organic HTM or inorganic p type as described above. material.
- HIL hole injection layer
- HTL hole transport layer
- the HIL or HTL can be prepared by printing the printing ink of the present invention, wherein the printing ink contains a functional material having a hole transporting ability, particularly a quantum dot or an organic HTM material.
- the light emitting device according to the present invention further comprises an electron injection layer (EIL) or electron transport layer (ETL) (105) comprising an organic ETM or inorganic n-type material as described above.
- EIL electron injection layer
- ETL electron transport layer
- the EIL or ETL can be prepared by printing a printing ink of the present invention, wherein the printing ink contains functional materials having electron transport capabilities, particularly quantum dots or organic ETM materials.
- the invention further relates to the use of a light emitting device according to the invention in various applications, including, but not limited to, various display devices, backlights, illumination sources, and the like.
- the two sides of the bottle were stoppered with a rubber stopper.
- the upper part was connected to a condenser tube, and then connected to a double-row tube, heated to 150 ° C, vacuumed for 40 min, and then passed through a nitrogen gas; 12 mL of a syringe was used.
- ODE was added to a three-necked flask.
- 1.92 mL of the solution 1 was quickly injected into a three-necked flask with a syringe for 12 min.
- After 12 min, 4 mL of the solution was added to the three-necked flask with a syringe.
- n-hexane was added to the three-necked flask, and then the liquid in the three-necked flask was transferred to a plurality of 10 mL centrifuge tubes, centrifuged to remove the lower layer precipitate, and repeated three times; acetone was added to the liquid after the post-treatment 1 to precipitate Centrifuge, remove the supernatant, leave a precipitate; then dissolve the precipitate with n-hexane, add acetone to precipitate, centrifuge, remove the supernatant, leave a precipitate, repeat three times; finally dissolve the precipitate with toluene, transfer to glass Stored in the bottle.
- solution 1 Weigh 0.0079 g of selenium and 0.1122 g of sulfur in a 25 mL single-necked flask, measure 2 mL of TOP, pass nitrogen, stir, and reserve, hereinafter referred to as solution 1; weigh 0.0128 g of CdO and 0.3670 g of zinc acetate. Take 2.5mL of OA in a 25mL three-necked flask, plug the two sides of the bottle with a rubber stopper, connect a condenser tube at the top, connect to the double-row tube, place the three-necked flask in a 50mL heating jacket, and vacuum the nitrogen.
- organic functional materials involved in the following examples are all commercially available, such as Jilin Elound (Jilin OLED Material Tech Co., Ltd, WWW.jl-oled.com), or synthesized according to methods reported in the literature. .
- Example 7 Preparation of organic light-emitting layer material printing ink containing 3-phenoxytoluene and dodecylbenzene
- the luminescent layer organic functional material comprises a phosphorescent host material and a phosphorescent illuminant material.
- the phosphorescent host material is selected from the group consisting of carbazole derivatives as follows:
- the phosphorescent emitter material is selected from the group consisting of ruthenium complexes as follows:
- a mixed solvent of 9.8 g of 3-phenoxytoluene and dodecylbenzene (weight ratio of 60:40) was prepared in a vial. 0.18 g of the phosphorescent host material and 0.02 g of the phosphorescent emitter material were weighed into a glove box, added to the solvent system in the vial, and stirred and mixed. After stirring at a temperature of 60 ° C until the organic functional material was completely dissolved, it was cooled to room temperature. The obtained organic functional material solution was filtered through a 0.2 ⁇ m PTFE filter. Seal and store.
- Example 8 Preparation of organic light-emitting layer material printing ink containing 3-phenoxytoluene and dodecylbenzene
- the luminescent layer organic functional material comprises a fluorescent host material and a fluorescent illuminant material.
- the fluorescent host material is selected from the group consisting of the following spiro derivatives:
- the fluorescent emitter material is selected from the group consisting of:
- Example 9 Preparation of organic light-emitting layer material printing ink containing 3-phenoxytoluene and dodecylbenzene
- the luminescent layer organic functional material comprises a host material and a TADF material.
- the host material is selected from the group consisting of the following structures:
- the TADF material is selected from the group consisting of the following structures:
- a mixed solvent of 9.8 g of 3-phenoxytoluene and dodecylbenzene (weight ratio of 60:40) was prepared in a vial. 0.19 g of the host material and 0.01 g of the TADF material were weighed in a glove box, added to the solvent system in the vial, and stirred and mixed. After stirring at a temperature of 60 ° C until the organic functional material was completely dissolved, it was cooled to room temperature. The obtained organic functional material solution was filtered through a 0.2 ⁇ m PTFE filter. Sealed and saved
- the printing ink comprises a hole transport layer material having a hole transporting ability.
- the hole transporting material is selected from the following triarylamine derivative derivatives:
- a mixed solvent of 9.8 g of 1-tetralone and dodecylbenzene (weight ratio of 60:40) was prepared in a vial.
- 0.2 g of the hole transporting material was weighed into a glove box, added to the solvent system in the vial, and stirred and mixed. After stirring at a temperature of 60 ° C until the organic functional material was completely dissolved, it was cooled to room temperature.
- the obtained organic functional material solution was filtered through a 0.2 ⁇ m PTFE filter. Seal and store.
- the viscosity of the quantum dot ink was tested by a DV-I Prime Brookfield rheometer; the surface tension of the quantum dot ink was tested by a SITA bubble pressure tomometer.
- the viscosity of the electron dot ink obtained in Example 5 was 5.4 ⁇ 0.3 cps, and the surface tension was 34.1 ⁇ 0.2 dyne/cm.
- the electron dot ink obtained in Example 6 had a viscosity of 7.3 ⁇ 0.3 cps and a surface tension of 36.2 ⁇ 0.1 dyne/cm.
- the electron dot ink obtained in Example 7 had a viscosity of 5.3 ⁇ 0.3 cps and a surface tension of 32.3 ⁇ 0.1 dyne/cm.
- the electron dot ink obtained in Example 8 had a viscosity of 5.5 ⁇ 0.5 cps and a surface tension of 33.1 ⁇ 0.3 dyne/cm.
- the electron dot ink obtained in Example 9 had a viscosity of 5.6 ⁇ 0.3 cps and a surface tension of 32.1 ⁇ 0.5 dyne/cm.
- the electron dot ink obtained in Example 10 had a viscosity of 7.6 ⁇ 0.3 cps and a surface tension of 33.1 ⁇ 0.2 dyne/cm.
- the functional layer in the light-emitting diode such as the light-emitting layer and the charge transport layer, can be prepared by inkjet printing using the printing ink containing the functional material based on the two organic solvent systems prepared above, and the specific steps are as follows.
- the ink containing the functional material is loaded into an ink tank which is assembled to an ink jet printer such as Dimatix Materials Printer DMP-3000 (Fujifilm).
- the waveform, pulse time and voltage of the jetted ink are adjusted to optimize ink jetting and to stabilize the ink jet range.
- the substrate of the OLED/QLED is 0.7 mm thick glass sputtered with an indium tin oxide (ITO) electrode pattern.
- ITO indium tin oxide
- the pixel defining layer is patterned on the ITO to form an internal hole for depositing the printing ink.
- the HIL/HTL material is then inkjet printed into the well and the solvent is removed by drying at elevated temperature in a vacuum to obtain a HIL/HTL film.
- the printing ink containing the luminescent functional material is ink-jet printed onto the HIL/HTL film, and the solvent is removed by drying at a high temperature in a vacuum atmosphere to obtain a luminescent layer film.
- a printing ink containing a functional material having electron transporting properties is ink-jet printed onto the luminescent layer film, and the solvent is removed by drying at a high temperature in a vacuum atmosphere to form an electron transport layer (ETL).
- ETL electron transport layer
- ETL electron transport layer
- a functional layer film is formed by inkjet printing, and the formed film has the beneficial effect of weakening the coffee ring effect.
- the functional layer film formed by the printing ink containing the functional material based on the two organic solvent systems of the present invention has a more A flat film surface and a more uniform film thickness. Therefore, the OLED/QLED device prepared by the printing ink of the present invention has greatly improved device efficiency and lifetime.
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Abstract
Description
Claims (25)
- 一种印刷组合物,其特征在于,包含功能材料和溶剂组合物,所述溶剂组合物包括第一溶剂和第二溶剂,所述第一溶剂的沸点T1小于所述第二溶剂的沸点T2,所述第一溶剂的表面张力δ1大于所述第二溶剂的表面张力δ2,且δ1-δ2≥2dyne/cm。
- 根据权利要求1所述的印刷组合物,其特征在于,所述T1≥160℃,T2-T1≥5℃。
- 根据权利要求1所述的印刷组合物,其特征在于,所述T1≥200℃,T2-T1≥20℃;δ1-δ2≥4dyne/cm。
- 根据权利要求1所述的印刷组合物,其特征在于,所述T1≥250℃,T2-T1≥40℃;δ1-δ2≥6dyne/cm。
- 根据权利要求1所述的印刷组合物,其特征在于,所述第一溶剂占所述溶剂组合物总质量的50%-80%,所述第二溶剂占所述溶剂组合物总质量的20%-50%。
- 根据权利要求1所述的印刷组合物,其特征在于,所述功能材料占所述印刷组合物总质量的0.3%-30%,所述溶剂组合物占所述印刷组合物总质量的70%-99.7%。
- 根据权利要求1-6任一项所述的印刷组合物,其特征在于,在25℃条件下,所述第一溶剂和所述第二溶剂的表面张力的范围均为19dyne/cm-50dyne/cm。
- 根据权利要求1-6任一项所述的印刷组合物,其特征在于,在25℃条件下,所述第一溶剂和所述第二溶剂的粘度范围均为1cPs-100cPs。
- 根据权利要求1-6任一项所述的印刷组合物,其特征在于,所述第一溶剂和所述第二溶剂分别独立选自芳族化合物、杂芳族化合物、酯类化合物、脂肪族酮或脂肪族醚。
- 根据权利要求10所述的印刷组合物,其特征在于,所述通式I选自如下结构:其中,X为CR1或N;Y选自CR2R3,SiR4R5,NR6,C=O,S,或O;R1,R2,R3,R4,R5,R6分别独立选自:H;D;具有1至20个C原子的直链烷基、烷氧基或硫代烷氧基;具有3至20个C原子的支链或环状的烷基、烷氧基或硫代烷氧基基团或者是 甲硅烷基;具有1至20个C原子的取代的酮基;具有2至20个C原子的烷氧基羰基;具有7至20个C原子的芳氧基羰基,氰基,氨基甲酰基,卤甲酰基,甲酰基,异氰基,异氰酸酯基,硫氰酸酯基或异硫氰酸酯基,羟基,硝基,CF3,Cl,Br,F;具有5至40个环原子的取代或未取代的芳族基或杂芳族环基;或具有5至40个环原子的芳氧基或杂芳氧基。
- 根据权利要求10所述的印刷组合物,其特征在于,所述取代基R选自:具有1至20个C原子的直链烷基、烷氧基或硫代烷氧基;或具有3至20个C原子的支链或环状的烷基、烷氧基或硫代烷氧基或者是甲硅烷基;或具有1至20个C原子的取代的酮基;或具有2至20个C原子的烷氧基羰基,或具有7至20个C原子的芳氧基羰基,氰基,氨基甲酰基,卤甲酰基,甲酰基,异氰基,异氰酸酯基,硫氰酸酯基或异硫氰酸酯基,羟基,硝基,CF3,Cl,Br,F;或具有5至40个环原子的取代或未取代的芳族基或杂芳族环基;或具有5至40个环原子的芳氧基或杂芳氧基。
- 根据权利要求9所述的印刷组合物,其特征在于,所述第一溶剂和所述第二溶剂分别独立选自:十二烷基苯、二戊苯、二乙苯、三甲苯、四甲苯、三戊苯、戊基甲苯、1-甲基萘、二己基苯、二丁基苯、对二异丙基苯、戊苯、四氢萘、环己基苯、氧萘、1-四氢萘酮、3-苯氧基甲苯、1-甲氧基萘、环己基苯、二甲基萘、3-异丙基联苯、对甲基异丙苯、苯甲酸苄酯、二苄醚或苯甲酸苄酯。
- 根据权利要求9所述的印刷组合物,其特征在于,所述第一溶剂和所述第二溶剂分别独立选自:辛酸烷酯、癸二酸烷酯、硬脂酸烷酯、苯甲酸烷酯、苯乙酸烷酯、肉桂酸烷酯、草 酸烷酯、马来酸烷酯、烷内酯、油酸烷酯、二辛醚、三乙二醇二甲醚、佛尔酮、2,6,8-三甲基-4-壬酮、苯乙酮、二苯甲酮、丁氧基苯、苄基丁基苯或2,5-二甲氧基甲苯。
- 根据权利要求1-6任一项所述的印刷组合物,其特征在于,所述功能材料为无机纳米材料或有机功能材料。
- 根据权利要求16所述的印刷组合物,其特征在于,所述无机纳米材料为发光量子点材料,所述发光量子点材料的发光波长位于380nm-2500nm之间。
- 根据权利要求17所述的印刷组合物,其特征在于,所述无机纳米材料选自元素周期表IV族、II-VI族、II-V族、III-V族、III-VI族、IV-VI族、I-III-VI族、II-IV-VI族、II-IV-V族二元或多元半导体化合物或由这些化合物组成的混合物。
- 根据权利要求16所述的印刷组合物,其特征在于,所述有机功能材料选自空穴注入材料,空穴传输材料,电子传输材料,电子注入材料,电子阻挡材料,空穴阻挡材料,发光体,主体材料和有机染料。
- 根据权利要求16所述的印刷组合物,其特征在于,所述有机功能材料包括至少一种主体材料和至少一种发光体材料。
- 权利要求1-20任一项所述印刷组合物在制备电子器件中的应用。
- 一种电子器件,其特征在于,采用权利要求1-20任一项所述印刷组合物制备功能薄膜。
- 根据权利要求22所述的电子器件,其特征在于,所述功能薄膜的制备方法包括如下步骤:将所述印刷组合物涂覆于基板上。
- 根据权利要求22所述的电子器件,其特征在于,所述涂覆的方法选自:喷墨打印,喷印,活版印刷,丝网印刷,浸涂,旋转涂布,刮刀涂布,辊筒印花,扭转辊印刷,平版印刷,柔版印刷,轮转印刷,喷涂,刷涂,移印或狭缝型挤压式涂布。
- 根据权利要求22-24任一项所述的电子器件,其特征在于,所述电子器件选自量子点发光二极管、量子点光伏电池、量子点发光电池、量子点场效应管、量子点发光场效应管、量子点激光器,量子点传感器,有机发光二极管、有机光伏电池、有机发光电池、有机场效应管、有机发光场效应管、有机激光器或有机传感器。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019065435A1 (ja) * | 2017-09-28 | 2019-04-04 | Dic株式会社 | インクおよび発光素子 |
EP3546532A4 (en) * | 2016-11-23 | 2019-12-04 | Guangzhou Chinaray Optoelectronic Materials Ltd. | PRINTING INK COMPOSITION, MANUFACTURING METHOD AND USE THEREOF |
JP2019214659A (ja) * | 2018-06-12 | 2019-12-19 | Dic株式会社 | 機能層形成用インク |
CN112210247A (zh) * | 2019-07-09 | 2021-01-12 | 精工爱普生株式会社 | 溶剂型墨组合物 |
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JP7013459B2 (ja) * | 2016-10-31 | 2022-01-31 | メルク パテント ゲーエムベーハー | 有機機能材料の調合物 |
KR20210109079A (ko) | 2020-02-26 | 2021-09-06 | 삼성디스플레이 주식회사 | 잉크 조성물, 이를 이용한 발광 소자 및 이의 제조 방법 |
KR20220042934A (ko) * | 2020-09-28 | 2022-04-05 | 삼성전자주식회사 | 발광 화합물을 포함하는 발광 재료, 이를 포함하는 발광 소자, 상기 발광 재료의 제조 방법 및 상기 발광 화합물의 제조 방법 |
KR20220092733A (ko) * | 2020-12-24 | 2022-07-04 | 삼성디스플레이 주식회사 | 나노 복합체, 이를 포함한 나노 입자 잉크 조성물 및 이를 포함한 발광 소자 |
WO2024096610A1 (ko) * | 2022-11-04 | 2024-05-10 | 주식회사 엘지화학 | 잉크 조성물, 이를 포함하는 유기물층 및 이를 포함하는 유기 발광 소자 |
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- 2016-09-26 WO PCT/CN2016/100161 patent/WO2017080323A1/zh active Application Filing
- 2016-09-26 CN CN201680059811.6A patent/CN108137968A/zh active Pending
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CN104145348A (zh) * | 2012-03-02 | 2014-11-12 | 日产化学工业株式会社 | 电荷传输性清漆 |
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EP3546532A4 (en) * | 2016-11-23 | 2019-12-04 | Guangzhou Chinaray Optoelectronic Materials Ltd. | PRINTING INK COMPOSITION, MANUFACTURING METHOD AND USE THEREOF |
US11248138B2 (en) | 2016-11-23 | 2022-02-15 | Guangzhou Chinaray Optoelectronic Materials Ltd. | Printing ink formulations, preparation methods and uses thereof |
WO2019065435A1 (ja) * | 2017-09-28 | 2019-04-04 | Dic株式会社 | インクおよび発光素子 |
JPWO2019065435A1 (ja) * | 2017-09-28 | 2020-10-22 | Dic株式会社 | インクおよび発光素子 |
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CN112210247A (zh) * | 2019-07-09 | 2021-01-12 | 精工爱普生株式会社 | 溶剂型墨组合物 |
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KR20180084087A (ko) | 2018-07-24 |
CN108137968A (zh) | 2018-06-08 |
US20180346741A1 (en) | 2018-12-06 |
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