KR20210080184A - Novel compound and organic light emitting device comprising the same - Google Patents

Abstract

The present invention provides a novel compound and an organic light emitting device using the same.

Description

Novel compound and organic light emitting device using same {NOVEL COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME}

The present invention relates to a novel compound and an organic light emitting device comprising the same.

In general, the organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy using an organic material. The organic light emitting device using the organic light emitting phenomenon has a wide viewing angle, excellent contrast, fast response time, and excellent luminance, driving voltage, and response speed characteristics, and thus many studies are being conducted.

An organic light emitting device generally has a structure including an anode and a cathode and an organic material layer between the anode and the cathode. The organic layer is often formed of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic light-emitting device, and may include, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like. In the structure of such an organic light emitting device, when a voltage is applied between the two electrodes, holes are injected into the organic material layer from the anode and electrons from the cathode are injected into the organic material layer. When the injected holes and electrons meet, excitons are formed, and these excitons are When it falls back to the ground state, it lights up.

The development of new materials for organic materials used in organic light emitting devices as described above is continuously required.

Meanwhile, in order to reduce process costs, an organic light emitting diode using a solution process, particularly an inkjet process, has been developed instead of a conventional deposition process. In the early days, it was attempted to develop an organic light emitting device by coating all organic light emitting device layers with a solution process, but current technology has limitations. A hybrid process using

Accordingly, the present invention provides a novel material for an organic light emitting device that can be used in an organic light emitting device and can be deposited by a solution process at the same time.

Korean Patent Publication No. 10-2000-0051826

The present invention relates to a novel compound and an organic light emitting device comprising the same.

The present invention provides a compound represented by the following formula (1):

[Formula 1]

In Formula 1,

each X is independently N or CH, provided that at least one of X is N;

Y is O or S;

Ar is each independently substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S;

R ₁ , R ₂ , and R ₃ are each independently hydrogen; heavy hydrogen; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S,

R ₄ is each independently hydrogen; heavy hydrogen; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; _{Or it is C 2-60} heteroaryl containing at least one heteroatom selected from the group consisting of substituted or unsubstituted N, O and S, or two adjacent R ₄ are bonded to each other to form C _4-60 aliphatic or forming an aromatic ring,

n1, n2, and n3 are each independently 0 or 1,

n4 is an integer from 1 to 4,

provided that at least one Ar is substituted with one or more deuterium, or at least one R ₁ , R ₂ , R ₃ , or R ₄ is substituted with one or more deuterium, or R ₁ , R ₂ , R ₃ , and R At least one of _{4 is deuterium.}

In addition, the present invention is a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer comprises a compound represented by the formula (1). to provide.

The compound represented by Formula 1 described above may be used as a material for an organic layer of an organic light emitting device, and may improve efficiency, low driving voltage, and/or lifespan characteristics in the organic light emitting device. In particular, the compound represented by the above formula (1) can be applied to a solution process, and can be used as a material for hole injection, hole transport, hole injection and transport, light emission, electron transport, or electron injection.

1 shows an example of an organic light emitting device including a substrate 1 , an anode 2 , a light emitting layer 3 , and a cathode 4 .
2 shows an example of an organic light emitting device including a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 7, an electron transport layer 8, and a cathode 4 did it

Hereinafter, it will be described in more detail to help the understanding of the present invention.

또는

는 다른 치환기에 연결되는 결합을 의미한다. In this specification,

or

means a bond connected to another substituent.

As used herein, the term "substituted or unsubstituted" refers to deuterium; halogen group; nitrile group; nitro group; hydroxyl group; carbonyl group; ester group; imid; amino group; phosphine oxide group; alkoxy group; aryloxy group; alkyl thiooxy group; arylthioxy group; an alkyl sulfoxy group; arylsulfoxy group; silyl group; boron group; an alkyl group; cycloalkyl group; alkenyl group; aryl group; aralkyl group; aralkenyl group; an alkylaryl group; an alkylamine group; an aralkylamine group; heteroarylamine group; arylamine group; an arylphosphine group; or N, O, and S atom means that it is substituted or unsubstituted with one or more substituents selected from the group consisting of a heterocyclic group containing one or more atoms, or substituted or unsubstituted with two or more substituents connected among the above-exemplified substituents . For example, "a substituent in which two or more substituents are connected" may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are connected.

In the present specification, the number of carbon atoms in the carbonyl group is not particularly limited, but preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.

In the present specification, in the ester group, the oxygen of the ester group may be substituted with a linear, branched or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms. Specifically, it may be a compound of the following structural formula, but is not limited thereto.

In the present specification, the number of carbon atoms of the imide group is not particularly limited, but it is preferably from 1 to 25 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.

In the present specification, the silyl group specifically includes a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, a phenylsilyl group, and the like. However, the present invention is not limited thereto.

In the present specification, the boron group specifically includes, but is not limited to, a trimethylboron group, a triethylboron group, a t-butyldimethylboron group, a triphenylboron group, a phenylboron group, and the like.

In the present specification, examples of the halogen group include fluorine, chlorine, bromine or iodine.

In the present specification, the alkyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to an exemplary embodiment, the number of carbon atoms in the alkyl group is 1 to 20. According to another exemplary embodiment, the alkyl group has 1 to 10 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 6 carbon atoms. Specific examples of the alkyl group include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n -pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl , n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2 -Dimethylheptyl, 1-ethyl-propyl, 1,1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl and the like, but are not limited thereto.

In the present specification, the alkenyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to an exemplary embodiment, the carbon number of the alkenyl group is 2 to 20. According to another exemplary embodiment, the carbon number of the alkenyl group is 2 to 10. According to another exemplary embodiment, the alkenyl group has 2 to 6 carbon atoms. Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-( Naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, stilbenyl group, styrenyl group, and the like, but are not limited thereto.

In the present specification, the cycloalkyl group is not particularly limited, but preferably has 3 to 60 carbon atoms, and according to an exemplary embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another exemplary embodiment, the carbon number of the cycloalkyl group is 3 to 20. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms. Specifically, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3, 4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but is not limited thereto.

In the present specification, the aryl group is not particularly limited, but preferably has 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 30. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 20. The aryl group may be a monocyclic aryl group such as a phenyl group, a biphenyl group, or a terphenyl group, but is not limited thereto. The polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, and the like, but is not limited thereto.

등이 될 수 있다. 다만, 이에 한정되는 것은 아니다.In the present specification, the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure. When the fluorenyl group is substituted,

etc. can be However, the present invention is not limited thereto.

In the present specification, the heterocyclic group is a heterocyclic group including at least one of O, N, Si and S as a heterogeneous element, and the number of carbon atoms is not particularly limited, but it is preferably from 2 to 60 carbon atoms. Examples of the heterocyclic group include a thiophene group, a furan group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a triazole group, a pyridyl group, a bipyridyl group, a pyrimidyl group, a triazine group, an acridyl group , pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group, indole group , carbazole group, benzoxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuranyl group, phenanthroline group, isoxazolyl group, thiadia and a jolyl group, a phenothiazinyl group, and a dibenzofuranyl group, but is not limited thereto.

In the present specification, the aryl group in the aralkyl group, the aralkenyl group, the alkylaryl group, and the arylamine group is the same as the example of the aryl group described above. In the present specification, the alkyl group among the aralkyl group, the alkylaryl group, and the alkylamine group is the same as the example of the above-described alkyl group. In the present specification, as for heteroaryl among heteroarylamines, the description of the above-described heterocyclic group may be applied. In the present specification, the alkenyl group among the aralkenyl groups is the same as the above-described examples of the alkenyl group. In the present specification, the description of the above-described aryl group may be applied except that arylene is a divalent group. In the present specification, the description of the above-described heterocyclic group may be applied, except that heteroarylene is a divalent group. In the present specification, the hydrocarbon ring is not a monovalent group, and the description of the above-described aryl group or cycloalkyl group may be applied, except that it is formed by combining two substituents. In the present specification, the heterocyclic group is not a monovalent group, and the description of the above-described heterocyclic group may be applied, except that it is formed by combining two substituents.

The present invention provides a compound represented by the above formula (1).

In the structure in which the carbazole group is bonded to the hexagonal ring containing at least one or more N, and the carbazole group through a tricyclic heterocyclic ring containing O or S, the compound represented by Formula 1 is substituted with at least one deuterium, using the same It is possible to improve the characteristics of the organic light emitting device. In particular, the compound represented by Formula 1 may exhibit better light emitting properties by increasing molecular rigidity by using a polycyclic aromatic core in which a plurality of aromatic rings are connected, thereby improving quantum efficiency and lifetime. can

In particular, the compound represented by Formula 1 has a structure in which at least one deuterium is substituted in a structure in which a nitrogen-containing hetero ring serving as an electron acceptor and a carbazole derivative serving as an electron donor are connected through dibenzofuran or dibenzothiophene. Have. Moreover, this nitrogen-containing heterocyclic ring is linked to the 3rd position of dibenzofuran/dibenzothiophene, which is the most conjugated position, opposite the carbazole derivative substituted for the electron donor role. It can improve the CT (charge-transfer) properties of the compound by helping to best transfer electrons from the ring to the nitrogen-containing heterocycle. In addition, by substituting deuterium in this structure, vibration energy is lowered to increase the stability of the material, and it can serve to help ensure that there is no problem in energy transfer to the dopant even in an unstable triplet state. Accordingly, the compound represented by Formula 1 has excellent properties in terms of low voltage, high efficiency, and long life when applied to an organic light emitting device.

Specifically, the compound represented by Formula 1 may be substituted with at least 4 or more or 4 to 26 deuterium.

In addition, according to the specific structure of the carbazole group bonded through a tricyclic heterocycle including O or S in Formula 1, the compound represented by Formula 1 may be represented by Formula 1-1 or 1-2 can:

[Formula 1-1]

[Formula 1-2]

In Formulas 1-1 and 1-2,

X, Y, Ar, R ₁ , R ₂ , R ₃ , n1, n2, and n3 are as defined in claim 1,

A is a benzene ring fused with two adjacent pentagonal rings,

Z is C(R ₅ ) ₂ , O, S, or N-(R ₆ );

R ₅ is each independently substituted or unsubstituted C _1-60 alkyl; Or a substituted or unsubstituted C _6-60 aryl,

R ₆ is substituted or unsubstituted C _6-60 aryl,

R' and R" are each independently hydrogen; deuterium; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 al kenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; or substituted or unsubstituted N, O and S _{C 2-60} heteroaryl including any one or more heteroatoms selected from the group

m1 is an integer from 1 to 4,

m2 is an integer from 1 to 6,

provided that at least one Ar is substituted with one or more deuterium, or at least one of R ₁ , R ₂ , R ₃ , R′, and R″ is deuterium.

Specifically, all of X may be N.

Specifically, each Ar is independently C _6-30 aryl, or C _6-28 aryl, or C _6-25 aryl, or includes any one or more heteroatoms selected from the group consisting of N, O and S substituted or unsubstituted C _5-30 heteroaryl, or C _8-20 heteroaryl, or C _12-18 heteroaryl.

For example, each Ar is independently phenyl, biphenylyl, terphenylyl, quaterphenylyl, naphthyl, phenanthrenyl, triphenylenyl, dimethylfluorenyl, diphenylfluorenyl, 9,9'- It may be any one of spirobifluorenyl, benzofluorenyl, dibenzofuranyl, dibenzothiophenyl, 9-phenyl-9H-carbazolyl, or small and medium substituted phenyl.

Preferably, in Formula 1, at least one of Ar is phenyl, biphenylyl, or phenyl substituted with five deuteriums, and the remaining Ar is one of phenyl, biphenylyl, dibenzofuranyl, or dibenzothiophenyl. It can be any one.

Specifically, R ₁ , R ₂ , and R ₃ are each independently hydrogen, deuterium, halogen, or cyano, or substituted or unsubstituted C _1-20 alkyl, or C _1-12 alkyl, or C _{1 - 6} alkyl, or substituted or unsubstituted C _1-20 alkoxy, or C _1-12 alkoxy, or C _1-6 alkoxy, or substituted or unsubstituted C _2-20 alkenyl, or C _2-12 al kenyl, or C _2-6 alkenyl, or substituted or unsubstituted C _2-20 alkynyl, or C _2-12 alkynyl, or C _2-6 alkynyl, or substituted or unsubstituted C _{3- 30} cycloalkyl, or C _3-25 cycloalkyl, or C _3-20 cycloalkyl, or substituted or unsubstituted C _6-30 aryl, or C _6-28 aryl, or C _6-25 aryl, or N, _{It may be a substituted or unsubstituted C 5-30} heteroaryl, or C _8-20 heteroaryl, or C _12-18 heteroaryl including any one or more heteroatoms selected from the group consisting of O and S.

For example, R ₁ , R ₂ , and R ₃ may each independently be hydrogen or deuterium.

Specifically, _{each R 4} is independently hydrogen, deuterium, halogen, or cyano, or substituted or unsubstituted C _1-20 alkyl, or C _1-12 alkyl, or C _1-6 alkyl, or substituted or unsubstituted C _1-20 alkoxy, or C _1-12 alkoxy, or C _1-6 alkoxy, or substituted or unsubstituted C _2-20 alkenyl, or C _2-12 alkenyl, or C _2-6 alkenyl, or substituted or unsubstituted C _2-20 alkynyl, or C _2-12 alkynyl, or C _2-6 alkynyl, or substituted or unsubstituted C _3-30 cycloalkyl, or C _{3 -25} cycloalkyl, or C _3-20 cycloalkyl, or substituted or unsubstituted C _6-30 aryl, or C _6-28 aryl, or C _6-25 aryl, or the group consisting of N, O and S _{substituted or unsubstituted C 5-30} heteroaryl, or C _8-20 heteroaryl, or C _12-18 heteroaryl containing one or more heteroatoms selected from, or two adjacent substituents combine to form deuterium Substituted or unsubstituted C _4-30 aliphatic or aromatic ring, or C _4-28 aliphatic or aromatic ring with or without deuterium substituted or unsubstituted C _4-25 aliphatic or aromatic ring with or without deuterium substituted or unsubstituted can form.

For example, R ₄ may be each independently hydrogen or deuterium.

In particular, the compound represented by Formula 1-1 corresponds to _{a case in which adjacent R 4} is bonded to each other, that is, two adjacent R ₄ are bonded to each other to form a ring.

Alternatively, in another example, in Formula 1, two adjacent R ₄ are bonded to each other to 1,1′-dimethyl-indene, benzofuran, benzothiophene, 1-phenyl-indole, and 1,1′ in which deuterium is substituted -Dimethyl-indene, deuterium substituted benzofuran, deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring forms, and the remaining R ₄ may be hydrogen or deuterium.

In particular, the compound represented by Formula 1-2 corresponds to the case in which two adjacent _{R 4 of the above-described R 4 are combined to form a C 4-60} aliphatic or aromatic ring in which deuterium is substituted or unsubstituted. .

Preferably, in Formula 1, at least one of Ar is phenyl, biphenylyl, or phenyl substituted with five deuteriums, and the remaining Ar is one of phenyl, biphenylyl, dibenzofuranyl, or dibenzothiophenyl. any one; R ₁ , R ₂ , and R ₃ are each hydrogen or deuterium; R ₄ is each hydrogen or deuterium, or two adjacent R ₄ are bonded to each other to form 1,1'-dimethyl-indene, benzofuran, benzothiophene, 1-phenyl-indole, or 1,1′ substituted with deuterium -dimethyl-indene, deuterium substituted benzofuran, deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring, the remaining R ₄ is hydrogen or deuterium; provided that at least one Ar is phenyl substituted with five deuterium, or at least one of R ₁ , R ₂ , R ₃ , and R ₄ is deuterium, or at least one pair of adjacent two R ₄ is bonded to each other to deuterium may form a substituted benzofuran, deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring.

Meanwhile, in Formula 1-2, R' and R" are each independently hydrogen, deuterium, halogen, or cyano, or a substituted or unsubstituted C _1-20 alkyl, or C _1-12 alkyl, or C _1-6 alkyl, or substituted or unsubstituted C _1-20 alkoxy, or C _1-12 alkoxy, or C _1-6 alkoxy, or substituted or unsubstituted C _2-20 alkenyl, or C _{2 - 12} alkenyl, or C _2-6 alkenyl, or substituted or unsubstituted C _2-20 alkynyl, or C _2-12 alkynyl, or C _2-6 alkynyl, or substituted or unsubstituted C _3-30 cycloalkyl, or C _3-25 cycloalkyl, or C _3-20 cycloalkyl, or substituted or unsubstituted C _6-30 aryl, or C _6-28 aryl, or C _6-25 aryl; or _{It may be a substituted or unsubstituted C 5-30} heteroaryl, or C _8-20 heteroaryl, or C _12-18 heteroaryl including any one or more heteroatoms selected from the group consisting of N, O and S. .

For example, R′ and R″ may each independently be hydrogen or deuterium.

Also, in Formula 1-2, Z may be C-(methyl) ₂ , C-(phenyl) ₂ , O, S, or N-(phenyl). For example, in Formula 1-2, R ₅ may be each independently methyl or phenyl, and R ₆ may be each independently phenyl.

On the other hand, in the compound represented by Formula 1, Ar, R ₃ , R ₄ substituted with a carbazole group bonded to a tricyclic heterocyclic ring containing O or S rotates the left and right positions of both ends of the carbazole ring It may be one containing all different structural isomers (stereo-isomers).

Representative examples of the compound represented by Formula 1 are as follows.

.

.

Meanwhile, the compound represented by Formula 1 may be used together with the compound represented by Formula 2 below when used in an organic light emitting device.

[Formula 2]

In Formula 2,

Ar ₁ and Ar ₂ are each independently, substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S;

R ₇ and R ₈ are each independently hydrogen; heavy hydrogen; halogen; cyano; nitro; amino; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S;

e and f are each independently an integer of 0 to 7.

In particular, when the compound represented by Formula 2 is used together with the compound represented by Formula 1 in an organic light emitting device, it is advantageous even when forming an exciplex, and the characteristic effects of low voltage, high efficiency, and long life are greater. may appear

Specifically, in Formula 2, Ar ₁ and Ar ₂ may each independently be phenyl, biphenylyl, terphenylyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, or dimethylfluorenyl.

In addition, R ₇ and R ₈ may each be hydrogen or phenyl.

In addition, e and f may be 0 or 1, respectively.

Representative examples of the compound represented by Formula 2 are as follows.

.

.

In addition, when the compound represented by Formula 2 together with the compound represented by Formula 1 is used in one or more organic material layers of the organic light emitting device, the weight ratio of the compound represented by Formula 1 to the compound represented by Formula 2 may be 20:80 to 50:50, or 35:65 to 45:55, preferably 40:60.

Meanwhile, the compound represented by Chemical Formula 1 may be prepared by a preparation method as shown in Scheme 1 below. The manufacturing method may be more specific in the Synthesis Examples to be described later.

[Scheme 1]

In Scheme 1,

X, Y, Ar, R ₁ , R ₂ , R ₃ , n1, n2, n3, and n4 are as defined in Formula 1 above,

X ₁ to X ₃ are each independently a halogen group.

In particular, in Scheme 1, X ₁ to X ₃ are different from each other, and may be fluorine, chlorine, bromine or iodine, respectively.

Scheme 1 is a reaction in which a hexagonal ring containing at least one N and a carbazole group are introduced into a tricyclic heterocyclic ring containing O or S.

In Reaction Scheme 1, the reaction step of introducing a hexagonal ring including at least one N into the tricyclic heterocycle containing O or S, and the reaction step of introducing a carbazole group, respectively, include palladium in the presence of a base. It can be carried out using a Pd catalyst or without a separate transition metal catalyst. In particular, in Scheme 1 _{, when any one of X 1} or X ₂ is fluorine, it can be carried out only in the presence of a base without a separate catalyst.

For example, the base component is sodium tert-butoxide (NaOtBu), sodium ethoxide (NaOEt), potassium carbonate (potassium carbonate, K ₂ CO ₃ ), sodium bicarbonate (sodium bicarbonate) , NaHCO ₃ ), Cesium carbonate (Cs ₂ CO ₃ ), sodium acetate (NaOAc), potassium acetate (KOAc), or triethylamine (Et ₃ N) can be used. have. Preferably, the base component is sodium tert-butoxide (NaOtBu), potassium acetate (KOAc), potassium carbonate (potassium carbonate, K ₂ CO ₃ ), or cesium carbonate, Cs ₂ CO ₃ ).

The palladium catalyst includes tris(dibenzylideneacetone)dipalladium (0) (tris(dibenzylideneacetone)-dipalladium (0), Pd ₂ (dba) ₃ ), bis(tri-(tert-butyl)phosphine)palladium ( 0) (bis(tri-(tert-butyl)phosphine)palladium(0), BTP, Pd(t-Bu ₃ P) ₂ ), bis(dibenzylideneacetone)palladium (0) (bis(dibenzylideneacetone)palladium ( 0)), tetrakis(triphenylphosphine)palladium (0)) or palladium(II) acetate (palladium(II) acetate, Pd(OAc) ₂ ) may be used. . Preferably, the palladium catalyst is bis(tri-(tert-butyl)phosphine)palladium(0)(bis(tri-(tert-butyl)phosphine)palladium(0), BTP, Pd(t-Bu ₃ P) ) ₂ ), bis(dibenzylideneacetone)palladium (0) (bis(dibenzylideneacetone)palladium (0)), tetrakis(triphenylphosphine)palladium (0) (tetrakis(triphenylphosphine)palladium (0)) can be have.

Further, the palladium catalyst is a tree-cyclohexyl phosphine (tricyclohexylphosphine), tri-tert-butylphosphine (tri- tert -butylphosphine, P (t Bu) 3) or triphenyl phosphine _{(triphenylphosphine, P (Ph) 3} ) It can also be used together with ligand compounds, such as these. For example, a palladium catalyst such as bis(dibenzylideneacetone)palladium (0) may be used together with a ligand compound such as tricyclohexylphosphine.

Specifically, in Scheme 1, according to the order of introducing the N-containing hexagonal ring and the carbazole group to the tricyclic heterocyclic ring including O or S, at least one hexagonal ring including N Accordingly, it may proceed in the same manner as in Scheme 1-1 or 1-2 below.

[Scheme 1-1]

[Scheme 1-2]

In Schemes 1-1 and 1-2, X, Y, Ar, R ₁ , R ₂ , R ₃ , n1, n2, n3, n4, and X ₁ to X ₃ are as defined in Scheme 1.

Scheme 1-1 is a reaction in which a carbazole group is first introduced into a tricyclic heterocyclic ring containing O or S, and then a hexagonal ring containing at least one N is introduced.

Specifically, Reaction Scheme 1-1 is a halogen group X ₁ , X ₂ Using a palladium catalyst (Pd catalyst) in the presence of a base in a tricyclic heterocyclic compound containing O or S containing X _{2 at} the X 2 position After introducing a carbazole group, and then reacting bis(pinacolato)diboron in the presence of a base and a palladium catalyst (Pd catalyst), a palladium catalyst in the presence of a base (Pd catalyst) is used to introduce a hexagonal ring containing at least one N at _{the remaining X 1 position.} In particular, in Scheme 1-1, X ₁ may be chlorine, and X ₂ may be bromine.

In addition, in Scheme 1-2, a carbazole group is introduced after first introducing a hexagonal ring including at least one N into a tricyclic heterocycle including O or S.

Specifically, Scheme 1-2 is a halogen group X ₁ , X ₂ bis(pinacolato) in the presence of a base and a palladium catalyst (Pd catalyst) in a tricyclic heterocyclic compound containing O or S including X 1 , X 2 After reacting diboron (bis(pinacolato)diboron), _{a hexagonal ring containing at least one N at the X 1} position is first introduced using a palladium catalyst (Pd catalyst) in the presence of a base, and then a base It consists of introducing a carbazole group at the _{X 2} position without using a palladium catalyst (Pd catalyst) or a separate transition metal catalyst in the presence of (base). In particular, in Scheme 1-2, X ₁ may be bromine and X ₂ may be chlorine, or X ₁ may be chlorine and X ₂ may be fluorine.

In addition, the method for preparing the compound represented by Formula 1 may further include performing an addition reaction or substitution reaction for converting hydrogen or a substituent included in each reactant or product used in Scheme 1 to another substituent. have. For example, at least one of a hexagonal ring including at least one N constituting the polycyclic structure represented by Formula 1, a tricyclic heterocyclic ring including O or S, and hydrogen included in the carbazole group as deuterium A reaction step of substituting or substituting halogen or the like with aryl or heteroaryl may be further included.

Substituent addition reaction or substitution reaction such as deuterium or aryl, heteroaryl, etc., is carried out individually for each reactant used in Scheme 1 or in the production step of each reactant, or intermediate products produced in each step of Scheme 1 It may be carried out as an additional step, or it may be carried out as an additional step for the final product obtained through Scheme 1. Specific reaction conditions and methods may be more specific in Synthesis Examples to be described later.

As an example, the reaction of substituting at least one or more of the hydrogens included in Formula 1 with deuterium is _{heavy water (D 2} O, in the presence of a platinum catalyst such as platinum (IV) oxide _{(PtO 2 , platinum(IV) oxide).} deuterium oxide) and the like. In addition, the addition reaction of a substituent such as aryl or heteroaryl may be accomplished by using a palladium catalyst (Pd catalyst) or the like in the presence of a base, and the base component and types of the palladium catalyst are the same as described above.

In addition, in the preparation method according to Scheme 1, a reaction of introducing a carbazole group or an additional substituent addition reaction or substitution reaction with a hexagonal ring containing at least one or more N to a tricyclic heterocyclic ring containing O or S Each reactor for this can be modified as known in the art. The manufacturing method may be more specific in Preparation Examples to be described later.

Meanwhile, the present invention provides an organic light emitting device including the compound represented by Formula 1 above. In one example, the present invention provides a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers includes the compound represented by Formula 1 above. do.

The organic material layer of the organic light emitting device of the present invention may have a single-layer structure, but may have a multi-layer structure in which two or more organic material layers are stacked. For example, the organic light emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, etc. as an organic material layer. However, the structure of the organic light emitting device is not limited thereto and may include a smaller number of organic layers.

In addition, the organic layer may include a hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes, and the hole injection layer, the hole transport layer, or a layer that simultaneously injects and transports holes is represented by Formula 1 The compounds shown are included.

In addition, the organic layer may include an emission layer, and the emission layer includes the compound represented by Formula 1 above.

In addition, the organic layer may include an electron transport layer or an electron injection layer, and the electron transport layer or the electron injection layer includes the compound represented by Formula 1 above.

In addition, the electron transport layer, the electron injection layer, or the layer that simultaneously transports and injects electrons includes the compound represented by Formula 1 above.

In addition, the organic layer may include a light emitting layer and an electron transport layer, and the electron transport layer may include a compound represented by Formula 1 above.

Meanwhile, the organic light emitting device according to the present invention may further include a compound represented by Formula 2 together with the compound represented by Formula 1 above. For example, an organic light emitting device according to the present invention may include a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer further includes a compound represented by Formula 2 together with the compound represented by Formula 1 can do.

Also, the organic light emitting device according to the present invention may be a normal type organic light emitting device in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate. Also, the organic light emitting device according to the present invention may be an inverted type organic light emitting device in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate. For example, the structure of the organic light emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2 .

1 shows an example of an organic light emitting device including a substrate 1 , an anode 2 , a light emitting layer 3 , and a cathode 4 . In such a structure, the compound represented by Formula 1 may be included in the light emitting layer.

2 shows an example of an organic light emitting device including a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 7, an electron transport layer 8, and a cathode 4 did it In such a structure, the compound represented by Formula 1 may be included in at least one of the hole injection layer, the hole transport layer, the light emitting layer, and the electron transport layer. Specifically, the compound represented by Formula 1 may be included in the light emitting layer, for example, may be included as a dopant material of the light emitting layer.

In the organic light emitting device according to the present invention, at least one layer of the organic material layer includes the compound represented by Formula 1 or the compound represented by Formula 2 together with the compound represented by Formula 1, except that It can be prepared by materials and methods known in the art. Also, when the organic light emitting device includes a plurality of organic material layers, the organic material layers may be formed of the same material or different materials.

For example, the organic light emitting device according to the present invention may be manufactured by sequentially stacking a first electrode, an organic material layer, and a second electrode on a substrate. At this time, by using a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation, a metal or conductive metal oxide or an alloy thereof is deposited on a substrate to form an anode. and forming an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer thereon, and then depositing a material that can be used as a cathode thereon. In addition to this method, an organic light emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.

In addition, the compound represented by Formula 1 may be formed into an organic material layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light emitting device. In particular, the compound represented by Formula 1 has excellent solubility in a solvent used for the solution coating method, and thus it is easy to apply the solution coating method. Here, the solution application method refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spray method, roll coating, and the like, but is not limited thereto.

Accordingly, the present invention provides a coating composition comprising the compound represented by Formula 1 and a solvent.

The solvent is not particularly limited as long as it is a solvent capable of dissolving or dispersing the compound according to the present invention, and for example, chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, o - Chlorine solvents, such as dichlorobenzene; ether solvents such as tetrahydrofuran and dioxane; aromatic hydrocarbon solvents such as toluene, xylene, trimethylbenzene, and mesitylene; aliphatic hydrocarbon solvents such as cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, and n-decane; ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone; ester solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate; Polyvalents such as ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerin, and 1,2-hexanediol alcohols and derivatives thereof; alcohol solvents such as methanol, ethanol, propanol, isopropanol and cyclohexanol; sulfoxide solvents such as dimethyl sulfoxide; and amide solvents such as N-methyl-2-pyrrolidone and N,N-dimethylformamide; benzoate solvents such as butyl benzoate and methyl-2-methoxy benzoate; tetralin; and solvents such as 3-phenoxy-toluene. In addition, the above-mentioned solvents may be used alone or as a mixture of two or more solvents.

In addition, the viscosity of the coating composition is preferably 1 cP to 10 cP, and coating is easy in the above range. In addition, the concentration of the compound according to the present invention in the coating composition is preferably 0.1 wt/v% to 20 wt/v%.

In addition, the present invention provides a method of forming a functional layer using the above-described coating composition. Specifically, coating the coating composition according to the present invention as described above in a solution process; and heat-treating the coated coating composition.

The heat treatment temperature in the heat treatment step is preferably 150 to 230 ℃. In addition, the heat treatment time is 1 minute to 3 hours, more preferably 10 minutes to 1 hour. In addition, the heat treatment is preferably performed in an inert gas atmosphere such as argon or nitrogen.

In one example, the first electrode is an anode, the second electrode is a cathode, or the first electrode is a cathode and the second electrode is an anode.

As the anode material, a material having a large work function is generally preferred so that holes can be smoothly injected into the organic material layer. Specific examples of the anode material include metals such as vanadium, chromium, copper, zinc, gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al or SnO _{2 :Sb;} conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene](PEDOT), polypyrrole, and polyaniline, but are not limited thereto.

The cathode material is preferably a material having a small work function to facilitate electron injection into the organic material layer. Specific examples of the anode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; and a multilayer structure material such as LiF/Al or LiO ₂ /Al, but is not limited thereto.

The hole injection layer is a layer for injecting holes from the electrode, and as a hole injection material, it has the ability to transport holes, so it has a hole injection effect at the anode, an excellent hole injection effect with respect to the light emitting layer or the light emitting material, and is produced in the light emitting layer A compound which prevents the movement of excitons to the electron injection layer or the electron injection material and is excellent in the ability to form a thin film is preferable. Preferably, the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer. Specific examples of the hole injection material include metal porphyrin, oligothiophene, arylamine-based organic material, hexanitrile hexaazatriphenylene-based organic material, quinacridone-based organic material, and perylene-based organic material. of organic substances, anthraquinones, polyaniline and polythiophene-based conductive polymers, and the like, but are not limited thereto.

The hole transport layer is a layer that receives holes from the hole injection layer and transports the holes to the light emitting layer. As a hole transport material, a material capable of transporting holes from the anode or hole injection layer to the light emitting layer and transferring them to the light emitting layer. This is suitable. Specific examples include, but are not limited to, an arylamine-based organic material, a conductive polymer, and a block copolymer having a conjugated portion and a non-conjugated portion together.

The light emitting material is a material capable of emitting light in the visible ray region by receiving and combining holes and electrons from the hole transport layer and the electron transport layer, respectively, and a material having good quantum efficiency for fluorescence or phosphorescence is preferable. Specific examples include 8-hydroxy-quinoline aluminum complex (Alq ₃ ); carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compounds; compounds of the benzoxazole, benzthiazole and benzimidazole series; Poly(p-phenylenevinylene) (PPV)-based polymers; spiro compounds; polyfluorene, rubrene, and the like, but is not limited thereto.

The emission layer may include a host material and a dopant material. The host material includes a condensed aromatic ring derivative or a compound containing a hetero ring. Specifically, condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, etc., and heterocyclic-containing compounds include carbazole derivatives, dibenzofuran derivatives, ladder type Furan compounds, pyrimidine derivatives, and the like, but are not limited thereto.

Examples of the dopant material include an aromatic amine derivative, a strylamine compound, a boron complex, a fluoranthene compound, and a metal complex. Specifically, the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, and periflanthene having an arylamino group, and the styrylamine compound is a substituted or unsubstituted derivative. It is a compound in which at least one arylvinyl group is substituted in the arylamine, and one or two or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group and an arylamino group are substituted or unsubstituted. Specifically, there are styrylamine, styryldiamine, styryltriamine, styryltetraamine, and the like, but is not limited thereto. In addition, the metal complex includes, but is not limited to, an iridium complex, a platinum complex, and the like. Preferably, the compound represented by Formula 1 according to the present invention is used as the dopant material. Meanwhile, as the dopant material, the compound represented by Formula 2 may be further used together with the compound represented by Formula 1 above.

The electron transport layer is a layer that receives electrons from the electron injection layer and transports them to the light emitting layer. As an electron transport material, it is a material that can receive electrons from the cathode and transfer them to the light emitting layer, and a material with high electron mobility is suitable. Do. Specific examples include Al complex of 8-hydroxyquinoline; complexes containing Alq ₃ (tris(8-hydroxyquinolino)aluminum); organic radical compounds; hydroxyflavone-metal complexes, and the like, but are not limited thereto. The electron transport layer may be used with any desired cathode material as used in accordance with the prior art. In particular, examples of suitable cathode materials are conventional materials having a low work function and followed by a layer of aluminum or silver. Specifically cesium, barium, calcium, ytterbium and samarium, followed in each case by an aluminum layer or a silver layer.

The electron injection layer is a layer that injects electrons from the electrode, has the ability to transport electrons, has an electron injection effect from the cathode, an excellent electron injection effect on the light emitting layer or the light emitting material, and hole injection of excitons generated in the light emitting layer. A compound which prevents movement to a layer and is excellent in the ability to form a thin film is preferable. Specifically, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone, etc., derivatives thereof, metals complex compounds and nitrogen-containing 5-membered ring derivatives, but are not limited thereto.

Examples of the metal complex compound include 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, Tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h] Quinolinato) beryllium, bis (10-hydroxybenzo [h] quinolinato) zinc, bis (2-methyl-8-quinolinato) chlorogallium, bis (2-methyl-8-quinolinato) ( o-crezolato)gallium, bis(2-methyl-8-quinolinato)(1-naphtolato)aluminum, bis(2-methyl-8-quinolinato)(2-naphtolato)gallium, etc. However, the present invention is not limited thereto.

The organic light emitting device according to the present invention may be a top emission type, a back emission type, or a double side emission type depending on the material used.

In addition, the compound represented by Formula 1 may be included in an organic solar cell or an organic transistor in addition to the organic light emitting device.

The compound represented by Formula 1 and the preparation of an organic light emitting device including the same will be described in detail in Examples below. However, the following examples are for illustrating the present invention, and the scope of the present invention is not limited thereto.

[Synthesis Example]

Synthesis Example 1: Synthesis of Compound 1

Step 1) Synthesis of compound 1-1

In a nitrogen atmosphere, 2-bromo-7-chlorodibenzo[b,d]furan (15 g, 53.3 mmol) and 9H-carbazole (9.8 g, 58.6 mmol) were added to 300 mL of toluene, stirred and refluxed. After that, sodium tert-butoxide (7.7 g, 79.9 mmol) and bis(tri-tert-butylphosphine)palladium(0) (0.8 g, 1.6 mmol) were added. After the reaction for 2 hours, the mixture was cooled to room temperature, and the organic layer was separated using chloroform and water, and then the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 15.7 g of compound 1-1. (Yield 80%, MS: [M+H] ⁺ =369).

Step 2) Synthesis of compound 1-2

In a nitrogen atmosphere, compound 1-1 (15 g, 40.8 mmol) and bis(pinacolato)diboron (11.4 g, 44.9 mmol) were refluxed in 300 mL of 1,4-dioxane and stirred. After that, potassium acetate (6 g, 61.2 mmol) was added, and after sufficient stirring, bis(dibenzylideneacetone)palladium(0) (0.7 g, 1.2 mmol) and tricyclohexylphosphine (0.7 g, 2.4 mmol) were added. After reacting for 7 hours, cooling to room temperature, and separating the organic layer using chloroform and water, the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 12.7 g of compound 1-2. (Yield 68%, MS: [M+H] ⁺ =460).

Step 3) Synthesis of compound 1

Compound 1-2 (15 g, 32.7 mmol) and 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5-triazine (9.8 g, 35.9 mmol) in 300 mL of THF in a nitrogen atmosphere added, stirred and refluxed. Thereafter, potassium carbonate (18.1 g, 130.6 mmol) was dissolved in 54 mL of water, and after sufficient stirring, tetrakis(triphenylphosphine)palladium(0) (1.1 g, 1 mmol) was added. After the reaction for 11 hours, the mixture was cooled to room temperature, the organic layer and the water layer were separated, and the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. After the concentrated compound was purified by silica gel column chromatography, 6.7 g of compound 1 was prepared through sublimation purification. (Yield 36%, MS: [M+H] ⁺ =571).

Synthesis Example 2: Synthesis of compound 2

In Synthesis Example 1, 9H-carbazole was replaced with 7,7-dimethyl-5,7-dihydroindeno[2,1-b]carbazole, 2-chloro-4-phenyl-6-(phenyl-d5)-1,3, Compound 2 was prepared in the same manner as in Compound 1, except that 5-triazine was changed to 2-chloro-4,6-bis(phenyl-d5)-1,3,5-triazine. (MS: [M+H] ⁺ =692).

Synthesis Example 3: Synthesis of compound 3

Step 1) Synthesis of compound 3-1

In a nitrogen atmosphere, 7-bromo-2,4-dichlorodibenzo[b,d]furan (15 g, 47.5 mmol) and bis(pinacolato)diboron (13.3 g, 52.2 mmol) were refluxed and stirred in 300 mL of 1,4-dioxane. did. Thereafter, potassium acetate (7 g, 71.2 mmol) was added, and after sufficient stirring, bis(dibenzylideneacetone)palladium(0) (0.8 g, 1.4 mmol) and tricyclohexylphosphine (0.8 g, 2.8 mmol) were added. After reacting for 7 hours, cooling to room temperature, and separating the organic layer using chloroform and water, the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 12.4 g of compound 3-1. (Yield 72%, MS: [M+H] ⁺ =364).

Step 2) Synthesis of compound 3-2

In a nitrogen atmosphere, compound 3-1 (15 g, 41.3 mmol) and 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5-triazine (12.4 g, 45.4 mmol) were dissolved in 300 mL of THF. added, stirred and refluxed. After that, potassium carbonate (22.8 g, 165.3 mmol) was dissolved in 69 mL of water and thoroughly stirred, and then tetrakis(triphenylphosphine)palladium(0) (1.4 g, 1.2 mmol) was added. After the reaction for 11 hours, the mixture was cooled to room temperature, the organic layer and the water layer were separated, and the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 12.9 g of compound 3-2. (Yield 66%, MS: [M+H] ⁺ =474).

Step 3) Synthesis of compound 3-3

Compound 3-2 (15 g, 31.7 mmol) and 9H-carbazole (5.8 g, 34.9 mmol) were added to 300 mL of toluene in a nitrogen atmosphere, and the mixture was stirred and refluxed. Then, sodium tert-butoxide (4.6 g, 47.5 mmol) and bis(tri-tert-butylphosphine)palladium(0) (0.5 g, 1 mmol) were added. After the reaction for 4 hours, it was cooled to room temperature, the organic layer was separated using chloroform and water, and the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 14.9 g of compound 3-3. (Yield 78%, MS: [M+H] ⁺ =605).

Step 4) Synthesis of compound 3

In a nitrogen atmosphere, compound 3-3 (15 g, 24.8 mmol) and phenylboronic acid (3.3 g, 27.3 mmol) were added to 300 mL of THF, followed by stirring and reflux. Thereafter, potassium carbonate (13.7 g, 99.3 mmol) was dissolved in 41 mL of water, and after sufficient stirring, tetrakis(triphenylphosphine)palladium(0) (0.9 g, 0.7 mmol) was added. After the reaction for 11 hours, the mixture was cooled to room temperature, the organic layer and the water layer were separated, and the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. After the concentrated compound was purified by silica gel column chromatography, 7.7 g of compound 3 was prepared through sublimation purification. (Yield 48%, MS: [M+H] ⁺ =647).

Synthesis Example 4: Synthesis of compound 4

Step 1) Synthesis of compound 4-1

In a nitrogen atmosphere, 3-chloro-6-fluorodibenzo[b,d]furan (15 g, 68 mmol) and bis(pinacolato)diboron (19 g, 74.8 mmol) were stirred under reflux in 300 mL of 1,4-dioxane. After that, potassium acetate (10 g, 102 mmol) was added and sufficiently stirred, bis(dibenzylideneacetone)palladium(0) (1.2 g, 2 mmol) and tricyclohexylphosphine (1.1 g, 4.1 mmol) were added thereto. After reacting for 6 hours, cooling to room temperature, and separating the organic layer using chloroform and water, the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 12.7 g of compound 4-1. (Yield 60%, MS: [M+H] ⁺ =313).

Step 2) Synthesis of compound 4-2

In a nitrogen atmosphere, compound 4-1 (15 g, 48.1 mmol) and 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5-triazine (14.4 g, 52.9 mmol) were dissolved in 300 mL of THF. added, stirred and refluxed. After that, potassium carbonate (26.6 g, 192.2 mmol) was dissolved in 80 mL of water, and after sufficient stirring, tetrakis(triphenylphosphine)palladium(0) (1.7 g, 1.4 mmol) was added. After 10 hours of reaction, the mixture was cooled to room temperature, the organic layer and the water layer were separated, and the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. The concentrated compound was purified by silica gel column chromatography to prepare 13.8 g of compound 4-2. (Yield 68%, MS: [M+H] ⁺ =423).

Step 3) Synthesis of compound 4

In a nitrogen atmosphere, compound 4-2 (20 g, 47.3 mmol) and 12H-benzo[4,5]thieno[2,3-a]carbazole (14.2 g, 52.1 mmol) were added to 400 mL of DMF and stirred under reflux. After that, cesium carbonate (46.3 g, 142 mmol) was added and stirred. After the reaction for 3 hours, the mixture was cooled to room temperature, and the organic layer was separated using chloroform and water, and then the organic layer was distilled. This was again dissolved in chloroform, washed twice with water, the organic layer was separated, anhydrous magnesium sulfate was added, stirred, filtered, and the filtrate was distilled under reduced pressure. After the concentrated compound was purified by silica gel column chromatography, 14.4 g of compound 4 was prepared through sublimation purification. (Yield 45%, MS: [M+H] ⁺ =677).

Synthesis Example 5: Synthesis of compound 5

In step 3 of Synthesis Example 4, 12H-benzo[4,5]thieno[2,3-a]carbazole was changed to 11H-benzofuro[3,2-b]carbazole, except for using Compound 5 was prepared in the same manner as described above. (MS: [M+H] ⁺ =661).

Synthesis Example 6: Synthesis of compound 6

Step 1) Synthesis of compound 6-1

In Synthesis Example 4, 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5-triazine to 2-chloro-4,6-diphenyl-1,3,5-triazine, 12H- Compound 6-1 was prepared in the same manner as in Compound 4, except that benzo[4,5]thieno[2,3-a]carbazole was changed to 9H-carbazole. (MS: [M+H] ⁺ =566).

Step 2) Synthesis of compound 6

Compound 6-1 (10 g, 17.7 mmol), PtO ₂ (1.2 g, 5.3 mmol), and D ₂ O 89 mL were placed in a shaker tube, and then the tube was sealed and heated at 250° C., 600 psi for 12 hours. When the reaction was completed, chloroform was added, and the reaction solution was transferred to a separatory funnel for extraction. The extract _{was dried over MgSO 4} , concentrated, and the sample was purified by silica gel column chromatography, and then 4.6 g of compound 6 was prepared through sublimation purification. (Yield 44%, MS: [M+H] ⁺ =590).

Synthesis Example 7: Synthesis of compound 7

In Synthesis Example 4, 3-chloro-6-fluorodibenzo[b,d]furan to 7-chloro-1-fluorodibenzo[b,d]furan, 2-chloro-4-phenyl-6-(phenyl-d5)- 1,3,5-triazine to 2-chloro-4,6-bis(phenyl-d5)-1,3,5-triazine, 12H-benzo[4,5]thieno[2,3-a]carbazole Compound 7 was prepared in the same manner as in the preparation method of compound 4, except that it was changed to 9H-carbazole. (MS: [M+H] ⁺ =576).

Synthesis Example 8: Synthesis of compound 8

In Synthesis Example 4, 3-chloro-6-fluorodibenzo[b,d]furan to 7-chloro-1-fluorodibenzo[b,d]furan, 2-chloro-4-phenyl-6-(phenyl-d5)- 1,3,5-triazine to 2-chloro-4,6-diphenyl-1,3,5-triazine, 12H-benzo[4,5]thieno[2,3-a]carbazole to 4-(phenyl- d5) Compound 8 was prepared in the same manner as in the preparation method of compound 4, except that it was changed to -9H-carbazole. (MS: [M+H] ⁺ =647).

Synthesis Example 9: Synthesis of compound 9

In Synthesis Example 4, 3-chloro-6-fluorodibenzo[b,d]furan to 3-chloro-6-fluorodibenzo[b,d]thiophene, 2-chloro-4-phenyl-6-(phenyl-d5)- 1,3,5-triazine to 2-chloro-4-(dibenzo[b,d]furan-3-yl)-6-(phenyl-d5)-1,3,5-triazine, 12H-benzo[4 ,5]thieno[2,3-a]carbazole was changed to 9H-carbazole, and compound 9 was prepared in the same manner as in the preparation method of compound 4, except that it was used. (MS: [M+H] ⁺ =677).

Synthesis Example 10: Synthesis of compound 10

In Synthesis Example 1, 9H-carbazole to 9H-carbazole-1,3,4,5,6,8-d6, 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5- Compound 10 was prepared in the same manner as in Compound 1, except that triazine was changed to 2-chloro-4,6-diphenyl-1,3,5-triazine. (MS: [M+H] ⁺ =572).

Synthesis Example 11: Synthesis of compound 11

In Synthesis Example 4, 2-chloro-4-phenyl-6-(phenyl-d5)-1,3,5-triazine was replaced with 2-([1,1'-biphenyl]-3-yl)-4-chloro- 6-phenyl-1,3,5-triazine, 12H-benzo[4,5]thieno[2,3-a]carbazole to 9H-carbazole-1,3,4,5,6,8-d6 Compound 611 was prepared in the same manner as in the preparation method of compound 4 except that it was used. (MS: [M+H] ⁺ =650).

[Experimental example]

Example 1

A glass substrate coated with indium tin oxide (ITO) to a thickness of 1,400 angstrom (Å, angstrom) was placed in distilled water in which detergent was dissolved and washed with ultrasonic waves. At this time, a product manufactured by Fischer Co. was used as the detergent, and distilled water that was secondarily filtered with a filter manufactured by Millipore Co. was used as the distilled water. After washing ITO for 30 minutes, ultrasonic washing was performed for 10 minutes by repeating twice with distilled water. After washing with distilled water, ultrasonic washing was performed with a solvent of isopropyl alcohol, acetone, and methanol, dried, and then transported to a plasma cleaner. In addition, after cleaning the substrate for 5 minutes using oxygen plasma, the substrate was transferred to a vacuum evaporator.

On the thus prepared ITO transparent electrode, the following HT-A compound and the following PD compound were thermally vacuum-deposited to a thickness of 100 Å in a weight ratio of 95:5, and then only the following HT-A compound was deposited to a thickness of 1150 Å to form a hole transport layer formed. On the hole transport layer, the following HT-B compound was thermally vacuum deposited to a thickness of 450 Å to form an electron blocking layer. On the electron blocking layer, the compound 1 prepared above and the compound GD below were vacuum-deposited in a weight ratio of 85:15 to a thickness of 400 Å to form an emission layer. On the light emitting layer, the following ET-A compound was vacuum deposited to a thickness of 50 Å to form a hole blocking layer. On the hole blocking layer, the following ET-B compound and the following Liq compound were thermally vacuum-deposited in a weight ratio of 2:1 to a thickness of 250 Å, and then LiF and magnesium were vacuum-deposited to a thickness of 30 Å in a weight ratio of 1:1. Thus, an electron transport and injection layer was formed. On the electron injection layer, magnesium and silver were deposited to a thickness of 160 Å in a weight ratio of 1:4 to form a cathode, thereby manufacturing an organic light emitting diode.

In the above process, the deposition rate of organic material was maintained at 0.4~0.7 Å/sec, the deposition rate of lithium fluoride of the negative electrode was 0.3 Å/sec, and the deposition rate of silver and magnesium was 2 Å/sec, and the vacuum degree during deposition was 2 ×10 ^-7 torr to 5×10 ^-6 torr was maintained, an organic light emitting device was manufactured.

Examples 2 to 11

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 1.

Examples 12 to 16

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 1. In Table 1 below, the ratio of each compound means a weight ratio, and the compounds PGH-1 and PGH-2 are as follows, respectively.

Comparative Examples 1 to 5

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 1. In Table 1, compounds GH-A, GH-B, GH-C, GH-D, and GH-E are as follows, respectively.

Comparative Examples 6 and 7

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 1. In Table 1 below, the ratio of each compound means a weight ratio, and compounds GH-A, GH-D, PGH-1 and PGH-2 are as described above.

The organic light-emitting devices prepared in Examples and Comparative Examples were stored in an oven at 110° C. for 30 minutes and heat-treated, and then voltage, efficiency, and lifetime (T95) were measured by applying a current, and the results are shown in Table 1 below. . At this time, voltage and efficiency were measured by applying a current density ^{of 10 mA/cm 2 .} In addition, T95 in Table 1 below means the time measured until the initial luminance decreases to 95% at a ^{current density of 20 mA/cm 2 .}

Emissive layer (host) Voltage
(V) efficiency
(cd/A) life span
(T95, hr) Example 1 compound 1 4.81 36.1 65 Example 2 compound 2 4.80 36.5 71 Example 3 compound 3 4.82 36.6 66 Example 4 compound 4 4.92 38.4 73 Example 5 compound 5 4.93 39.1 70 Example 6 compound 6 4.91 38.7 89 Example 7 compound 7 4.97 37.1 84 Example 8 compound 8 4.97 37.3 78 Example 9 compound 9 4.81 35.7 67 Experimental Example 10 compound 10 4.81 36.1 76 Experimental Example 11 compound 11 4.92 37.4 85 Experimental Example 12 PGH-1: Compound 1 (60:40) 4.23 51.5 121 Experimental Example 13 PGH-1: Compound 4 (60:40) 4.32 51.4 130 Experimental Example 14 PGH-2: Compound 6 (60:40) 4.33 52.1 143 Experimental Example 15 PGH-2: Compound 8 (60:40) 4.34 51.8 131 Experimental Example 16 PGH-1: Compound 11 (60:40) 4.33 51.5 138 Comparative Example 1 GH-A 4.81 36.0 48 Comparative Example 2 GH-B 4.85 27.1 52 Comparative Example 3 GH-C 5.38 31.6 51 Comparative Example 4 GH-D 5.88 12.3 5 Comparative Example 5 GH-E 5.72 14.4 16 Comparative Example 6 PGH-1:GH-A (60:40) 4.23 50.3 77 Comparative Example 7 PGH-2:GH-D (60:40) 4.88 28.8 10

Referring to Table 1, at least one deuterium is substituted in the structure in which the carbazole group is bonded to the hexagonal ring containing at least one N according to the present invention through a tricyclic heterocyclic ring containing O or S. When compounds 1 to 11 having a polycyclic structure are applied as hosts of an organic light emitting device, it can be seen that low voltage, high efficiency, and long life characteristics are more excellent when compared with the compounds applied in Comparative Examples.

In particular, these properties are, as in Examples 12 to 16, even when forming an exciplex using a compound of PGH-1 and PGH-2, which is a kind of compound represented by Formula 2, together as a host. Advantageously, it can be seen that the characteristic effects of low voltage, high efficiency, and long life are greater.

1: Substrate 2: Anode
3: light emitting layer 4: cathode
5: hole injection layer 6: hole transport layer
7: light emitting layer 8: electron transport layer

Claims (20)

A compound represented by the following formula (1):
[Formula 1]

In Formula 1,
each X is independently N or CH, provided that at least one of X is N;
Y is O or S;
Ar is each independently substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S;
R ₁ , R ₂ , and R ₃ are each independently hydrogen; heavy hydrogen; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl containing any one or more heteroatoms selected from the group consisting of N, O and S,
R ₄ is each independently hydrogen; heavy hydrogen; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; _{Or C 2-60} heteroaryl containing at least one heteroatom selected from the group consisting of substituted or unsubstituted N, O and S, or two adjacent R ₄ are bonded to each other to C _4-60 aliphatic or forming an aromatic ring,
n1, n2, and n3 are each independently 0 or 1,
n4 is an integer from 1 to 4,
provided that at least one Ar is substituted with one or more deuterium, or at least one R ₁ , R ₂ , R ₃ , or R ₄ is substituted with one or more deuterium, or R ₁ , R ₂ , R ₃ , and R At least one of _{4 is deuterium.}
According to claim 1,
The compound represented by Formula 1 is that at least 4 or more deuterium is substituted,
compound.
According to claim 1,
The compound represented by Formula 1 is one represented by the following Formula 1-1 or 1-2,
compound:
[Formula 1-1]

[Formula 1-2]

In Formulas 1-1 and 1-2,
X, Y, Ar, R ₁ , R ₂ , R ₃ , n1, n2, and n3 are as defined in claim 1,
A is a benzene ring fused with two adjacent pentagonal rings,
Z is C(R ₅ ) ₂ , O, S, or N-(R ₆ );
R ₅ is each independently substituted or unsubstituted C _1-60 alkyl; Or a substituted or unsubstituted C _6-60 aryl,
R ₆ is substituted or unsubstituted C _6-60 aryl,
R' and R" are each independently hydrogen; deuterium; halogen; cyano; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _1-60 alkoxy; substituted or unsubstituted C _2-60 al kenyl; substituted or unsubstituted C _2-60 alkynyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _6-60 aryl; or substituted or unsubstituted N, O and S _{C 2-60} heteroaryl including any one or more heteroatoms selected from the group
m1 is an integer from 1 to 4,
m2 is an integer from 1 to 6,
provided that at least one Ar is substituted with one or more deuterium, or at least one of R ₁ , R ₂ , R ₃ , R′, and R″ is deuterium.
According to claim 1,
X is N;
compound.
According to claim 1,
Ar is each C _6-30 aryl; _{Or a substituted or unsubstituted C 5-30} heteroaryl comprising any one or more heteroatoms selected from the group consisting of N, O and S;
compound.
According to claim 1,
Ar is phenyl, biphenylyl, terphenylyl, quaterphenylyl, naphthyl, phenanthrenyl, triphenylenyl, dimethylfluorenyl, diphenylfluorenyl, 9,9'-spirobifluorenyl, respectively; which is benzofluorenyl, dibenzofuranyl, dibenzothiophenyl, 9-phenyl-9H-carbazolyl, or small and small substituted phenyl;
compound.
According to claim 1,
At least one of Ar is phenyl, biphenylyl, or phenyl substituted with five deuteriums, and the other Ar is any one of phenyl, biphenylyl, dibenzofuranyl, or dibenzothiophenyl;
compound.
According to claim 1,
R ₁ , R ₂ , and R ₃ are each hydrogen or deuterium;
compound.
According to claim 1,
R ₄ is each hydrogen or deuterium;
compound.
According to claim 1,
two adjacent R ₄ are bonded to each other to form 1,1'-dimethyl-indene, benzofuran, benzothiophene, 1-phenyl-indole, deuterium substituted 1,1'-dimethyl-indene, deuterium substituted benzofuran , deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring, and the remaining R ₄ is hydrogen or deuterium;
compound.
According to claim 1,
At least one of Ar is phenyl, biphenylyl, or phenyl substituted with five deuteriums, and the other Ar is any one of phenyl, biphenylyl, dibenzofuranyl, or dibenzothiophenyl;
R ₁ , R ₂ , and R ₃ are each hydrogen or deuterium,
each R ₄ is hydrogen or deuterium, or two adjacent R ₄ are bonded to each other to form 1,1'-dimethyl-indene, benzofuran, benzothiophene, 1-phenyl-indole, or 1,1′ substituted with deuterium -dimethyl-indene, deuterium substituted benzofuran, deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring forms, the remaining R ₄ is hydrogen or deuterium;
provided that at least one Ar is phenyl substituted with five deuterium, or at least one of R ₁ , R ₂ , R ₃ , and R ₄ is deuterium, or at least one pair of adjacent two R ₄ is bonded to each other to deuterium to form a substituted benzofuran, deuterium substituted benzothiophene, or deuterium substituted 1-phenyl-indole ring,
compound.
4. The method of claim 3,
R' and R" are each hydrogen or deuterium;
compound.
4. The method of claim 3,
R ₅ is each methyl or phenyl;
compound.
4. The method of claim 3,
R ₆ is each phenyl,
compound.
According to claim 1,
The compound represented by Formula 1 is any one selected from the group consisting of
compound:

.
a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers contains the compound according to any one of claims 1 to 15 which is an organic light emitting device.
17. The method of claim 16,
The organic layer containing the compound is a light emitting layer,
organic light emitting device.
18. The method of claim 17,
The light emitting layer further comprises a compound represented by the following formula (2),
Organic light emitting device:
[Formula 2]

In Formula 2,
Ar ₁ and Ar ₂ are each independently, substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S;
R ₇ and R ₈ are each independently hydrogen; heavy hydrogen; halogen; cyano; nitro; amino; substituted or unsubstituted C _1-60 alkyl; substituted or unsubstituted C _3-60 cycloalkyl; substituted or unsubstituted C _2-60 alkenyl; substituted or unsubstituted C _6-60 aryl; _{Or a substituted or unsubstituted C 5-60} heteroaryl containing one or more heteroatoms selected from the group consisting of N, O and S;
e and f are each independently an integer of 0 to 7.
19. The method of claim 18,
Ar ₁ and Ar ₂ are each independently phenyl, biphenylyl, terphenylyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, or dimethylfluorenyl;
organic light emitting device.
19. The method of claim 18,
The compound represented by Formula 2 is any one selected from the group consisting of
Organic light emitting device:

.

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