CN114854408B - Method for preparing perovskite luminescent material in situ, perovskite luminescent material and luminescent device - Google Patents
Method for preparing perovskite luminescent material in situ, perovskite luminescent material and luminescent device Download PDFInfo
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- CN114854408B CN114854408B CN202210409079.8A CN202210409079A CN114854408B CN 114854408 B CN114854408 B CN 114854408B CN 202210409079 A CN202210409079 A CN 202210409079A CN 114854408 B CN114854408 B CN 114854408B
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- 239000000463 material Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 26
- 239000000243 solution Substances 0.000 claims abstract description 57
- LYQFWZFBNBDLEO-UHFFFAOYSA-M caesium bromide Chemical compound [Br-].[Cs+] LYQFWZFBNBDLEO-UHFFFAOYSA-M 0.000 claims abstract description 34
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims abstract description 33
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 32
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 32
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 32
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000005642 Oleic acid Substances 0.000 claims abstract description 32
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 32
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 32
- 239000011259 mixed solution Substances 0.000 claims abstract description 21
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- -1 p-fluorophenylethylamine bromine Chemical compound 0.000 claims abstract description 12
- 239000003880 polar aprotic solvent Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000006228 supernatant Substances 0.000 claims abstract description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical group CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 28
- 238000005119 centrifugation Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 9
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- ZASWJUOMEGBQCQ-UHFFFAOYSA-L dibromolead Chemical compound Br[Pb]Br ZASWJUOMEGBQCQ-UHFFFAOYSA-L 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010129 solution processing Methods 0.000 description 3
- ORNUPOUGVYVYHV-UHFFFAOYSA-N 2-(4-fluorophenyl)ethylazanium bromide Chemical compound [Br-].FC1=CC=C(CC[NH3+])C=C1 ORNUPOUGVYVYHV-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000012296 anti-solvent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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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
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
- C09K11/664—Halogenides
- C09K11/665—Halogenides with alkali or alkaline earth metals
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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
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
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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
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- Luminescent Compositions (AREA)
Abstract
The application discloses a method for preparing a perovskite luminescent material in situ, the perovskite luminescent material and a luminescent device. The method for preparing the perovskite luminescent material in situ comprises the following steps: pbBr is prepared 2 Dissolving CsBr in a polar aprotic solvent to obtain a first mixed solution; adding a p-fluorophenylethylamine bromine solution into the first mixed solution, uniformly mixing, and standing to obtain a second mixed solution; and mixing the second mixed solution with chlorobenzene solution containing p-toluenesulfonic acid and oleic acid, centrifuging, standing, and taking supernatant to obtain perovskite luminescent material solution.
Description
Technical Field
The application relates to the technical field of display, in particular to a method for preparing a perovskite luminescent material in situ, the perovskite luminescent material and a luminescent device.
Background
The perovskite material has the characteristics of high carrier mobility, adjustable band gap and flexible process adaptation, and particularly has the advantages of simple processing technology, low cost and the like, so that the perovskite material has a great application prospect in the field of a series of optoelectronic devices. Particularly, the perovskite material has the characteristics of high luminous efficiency, narrow emission, adjustable spectrum in a continuous visible light range and the like, so that the perovskite material is expected to be applied to the display field, in particular to high-end display.
At present, most perovskite solutions have poor stability in air, so that wet process processes are mostly completed in inert atmosphere such as glove boxes. This not only greatly increases manufacturing costs, but also limits the use of some wet process equipment.
Accordingly, there is a need to improve a method of forming stable perovskite materials in air to solve the problems of the prior art.
Disclosure of Invention
The purpose of the application is to provide a method for preparing perovskite luminescent material in situ, which can prepare and obtain perovskite material stable in air, and solves the technical problems.
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, which comprises the following steps:
PbBr is prepared 2 Dissolving CsBr in a polar aprotic solvent to obtain a first mixed solution;
adding p-fluorophenylethylamine bromine (p-F-PEABr) solution into the first mixed solution, uniformly mixing, and standing to obtain a second mixed solution;
and mixing the second mixed solution with a chlorobenzene solution containing p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA), centrifuging, standing, and taking supernatant to obtain a perovskite luminescent material solution.
Alternatively, in some embodiments of the present application, the concentration of the first mixed solution is 0.1 to 1mol/L.
Optionally, in some embodiments of the present application, the PbBr 2 The molar ratio of CsBr to CsBr is 1:1-1.2.
Alternatively, in some embodiments of the present application, the polar aprotic solvent is N, N-Dimethylformamide (DMF).
Alternatively, in some embodiments of the present application, the concentration of the p-fluorophenylethylamine bromide (p-F-PEABr) solution is from 0.05 to 0.6mol/L.
Alternatively, in some embodiments of the present application, the solvent of the p-fluorophenylethylamine bromine (p-F-PEABr) solution is N, N-Dimethylformamide (DMF).
Alternatively, in some embodiments of the present application, the molar ratio of the toluene sulfonic acid (p-Ts) to the Oleic Acid (OA) is from 5 to 20:1.
alternatively, in some embodiments of the present application, the concentration of p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA) in the chlorobenzene solution is 0.05-0.6 mol/L.
Alternatively, in some embodiments of the present application, the centrifugation is performed at a speed of 6000 to 12000rpm and for a time period of 5 to 20 minutes.
Optionally, in some embodiments of the present application, the perovskite luminescent material solution is stably present in air.
Correspondingly, the embodiment of the application also provides a perovskite luminescent material, which is prepared by adopting the method for preparing the perovskite luminescent material in situ.
In addition, the embodiment also provides a light-emitting device, which comprises the perovskite light-emitting material.
The beneficial effects of this application:
in the method for preparing the perovskite material stable in the air in situ, an autodeposition and precipitation mechanism of perovskite precursor liquid in an antisolvent is fully utilized, and a long-chain organic amine ligand is used for preparing the perovskite solution stable in the air in situ by combining the coating of a large-volume fluorine-containing organic ammonium ligand of the quasi-two-dimensional perovskite material. In addition, the perovskite luminescent material solution is placed in normal-temperature air for 1month, no observable sedimentation is seen in the system, and the luminous intensity is not reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph showing the PL test spectrum in test example 1 of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or on the order of construction. Various embodiments of the invention may exist in a range of forms; it should be understood that the description in a range format is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the invention; it is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the ranges, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is referred to herein, it is meant to include any reference number (fractional or integer) within the indicated range.
In the research and practice process of the prior art, the inventor of the application finds that the solution processing is a device processing mode with the advantages of low cost, wide application range, continuous large-area preparation and the like. Perovskite materials have excellent solution processing characteristics, and can theoretically realize solution processing modes of different modes such as spin coating, ink-jet printing, blade coating, roll-to-roll and the like. In addition, most perovskite solutions are poor in stability in air at present, so that the wet process is finished in inert atmosphere such as a glove box. This not only greatly increases manufacturing costs, but also limits the use of some wet process equipment. In addition, the existing perovskite wet solution is based on a perovskite quantum dot and nonpolar solution system, which not only limits the further improvement of the solid content of perovskite in the solution, but also increases the complicated chemical synthesis process of the perovskite quantum dot and greatly increases the cost compared with a bulk phase perovskite material formed by direct crystallization of a precursor solution.
The method for developing the in-situ-formable air stable perovskite material has very important significance for further development and commercialization of perovskite devices.
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, the perovskite luminescent material and a luminescent device. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, which comprises the following steps:
PbBr is prepared 2 Dissolving CsBr in a polar aprotic solvent to obtain a first mixed solution;
adding p-fluorophenylethylamine bromine (p-F-PEABr) solution into the first mixed solution, uniformly mixing, and standing to obtain a second mixed solution;
and mixing the second mixed solution with a chlorobenzene solution containing p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA), centrifuging, standing, and taking supernatant to obtain a perovskite luminescent material solution.
In some embodiments of the present application, the PbBr 2 The molar ratio of CsBr to CsBr is 1:1-1.2. For example, the PbBr 2 The molar ratio to CsBr may be 1:1, 1:1.1, or 1:1.2.
Further, pbBr in the first mixed solution 2 The concentration of CsBr is 0.1-1 mol/L; for example, the concentration of the first mixed solution may be 0.1mol/L, 0.2mol/L, 0.3mol/L, 0.4mol/L, 0.5mol/L, 0.6mol/L, 0.7mol/L, 0.8mol/L, 0.9mol/L, or 1mol/L. And, combining the aforementioned PbBr 2 The molar ratio of CsBr to PbBr can be obtained 2 Concentration in the first mixed solution separately from CsBr.
In some embodiments of the present application, the polar aprotic solvent may be N, N-Dimethylformamide (DMF).
In some embodiments of the present application, the concentration of the p-fluorophenylethylamine bromine (p-F-PEABr) solution is from 0.05 to 0.6mol/L. For example, the concentration of the p-fluorophenylethylamine bromine solution may be 0.05mol/L, 0.06mol/L, 0.08mol/L, 0.1mol/L, 0.15mol/L, 0.2mol/L, 0.25mol/L, 0.3mol/L, 0.35mol/L, 0.4mol/L, 0.45mol/L, 0.5mol/L, 0.55mol/L, or 0.6mol/L.
Further, the solvent of the p-fluorophenylethylamine bromide (p-F-PEABr) solution may be N, N-Dimethylformamide (DMF).
In some embodiments of the present application, the molar ratio of the toluene sulfonic acid (p-Ts) to the Oleic Acid (OA) is from 5 to 20:1. for example, the molar ratio of the toluene sulfonic acid (p-Ts) to the Oleic Acid (OA) may be 5: 1. 6: 1. 7: 1. 8: 1. 10: 1. 12: 1. 14: 1. 15: 1. 17: 1. 19:1 or 20:1.
further, the concentration of p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA) in the chlorobenzene solution is 0.05-0.6 mol/L; for example, the concentration may be 0.05mol/L, 0.06mol/L, 0.08mol/L, 0.1mol/L, 0.15mol/L, 0.2mol/L, 0.25mol/L, 0.3mol/L, 0.35mol/L, 0.4mol/L, 0.45mol/L, 0.5mol/L, 0.55mol/L, or 0.6mol/L. The concentration of the toluene sulfonic acid and the oleic acid can be obtained by combining the molar ratio of the toluene sulfonic acid and the oleic acid.
In some embodiments of the present application, the rotational speed of the centrifugation is 6000 to 12000rpm; for example, the rotation speed may be 6000rpm, 7000rpm, 8000rpm, 9000rpm, 10000rpm, 11000rpm or 12000rpm. The centrifugation time is 5-20 min; for example, the centrifugation time may be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 minutes. In the application, the rotation speed and time of the centrifugation can be freely matched. Further, the rotational speed and time of centrifugation may be selected according to the actual situation.
In the embodiment of the application, the prepared perovskite luminescent material solution is very stable in air. For example, the perovskite luminescent material solution prepared by the method is placed in normal temperature air for 1month, no observable sedimentation is seen in the system, and the luminous intensity is not reduced.
The perovskite solution can be applied to photoelectric devices such as photoluminescence color conversion layers, electroluminescence and the like.
The embodiment of the application also provides a perovskite luminescent material, which is prepared by adopting the method for preparing the perovskite luminescent material in situ.
Embodiments also provide a light emitting device comprising a perovskite light emitting material as described above.
The present application has been conducted in succession with a number of tests, and the invention will now be described in further detail with reference to a few test results, as will be described in detail below in connection with specific examples.
Example 1
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, which comprises the following steps:
s1, dissolving PbBr2 and CsBr in a polar aprotic solvent such as DMF according to a ratio of 1:1, wherein the concentration of the solution is 1mol/L;
s2, dropwise adding the solution obtained in the step 1 into the stirred DMF solution containing p-fluorophenylethylamine bromine (p-F-PEABr), wherein the concentration of the p-F-PEABr is 0.05mol/L, uniformly stirring, and standing;
s3, rapidly adding the solution obtained in the step 2 into a vigorously stirred chlorobenzene solution containing p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA), stirring for 10S, and immediately performing centrifugal separation; wherein, the concentration ratio of p-toluenesulfonic acid (p-Ts) to Oleic Acid (OA) is 20:1, the concentration is 0.05mol/L; centrifugation time: 20min, rotational speed: 6000rpm;
s4, standing, and taking supernatant to obtain perovskite solution.
Example 2
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, which comprises the following steps:
s1, dissolving PbBr2 and CsBr in a polar aprotic solvent such as DMF according to a ratio of 1:1.2, wherein the concentration of the solution is 0.1mol/L;
s2, dropwise adding the solution obtained in the step 1 into the stirred DMF solution containing p-fluorophenylethylamine bromine (p-F-PEABr), wherein the concentration of the p-F-PEABr is 0.6mol/L, uniformly stirring, and standing;
s3, rapidly adding the solution obtained in the step 2 into a vigorously stirred chlorobenzene solution containing p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA), stirring for 10S, and immediately performing centrifugal separation; wherein, the concentration ratio of p-toluenesulfonic acid (p-Ts) to Oleic Acid (OA) is 5:1, the concentration is 0.6mol/L; centrifugation time: 5min, rotation speed: 12000rpm;
s4, standing, and taking supernatant to obtain perovskite solution.
Example 3
The embodiment of the application provides a method for preparing a perovskite luminescent material in situ, which comprises the following steps:
s1, dissolving PbBr2 and CsBr in a polar aprotic solvent such as DMF according to a ratio of 1:1.1, wherein the concentration of the solution is 0.5mol/L;
s2, dropwise adding the solution obtained in the step 1 into the stirred DMF solution containing p-fluorophenylethylamine bromine (p-F-PEABr), wherein the concentration of the p-F-PEABr is 0.4mol/L, uniformly stirring, and standing;
s3, rapidly adding the solution obtained in the step 2 into a vigorously stirred chlorobenzene solution containing p-toluenesulfonic acid (p-Ts) and Oleic Acid (OA), stirring for 10S, and immediately performing centrifugal separation; wherein, the concentration ratio of p-toluenesulfonic acid (p-Ts) to Oleic Acid (OA) is 10:1, the concentration is 0.4mol/L; the centrifugation time is 12min, and the rotating speed is 9000rpm;
s4, standing, and taking supernatant to obtain perovskite solution.
Test example 1
The perovskite solution in example 3 of the present application was subjected to PL test spectra initially and after 1month in room temperature air to investigate the performance stability of the perovskite solution of the present application. See in detail figure 1.
FIG. 1 is a PL test spectrum of a perovskite solution at an initial stage and after 1month exposure to room temperature air. As can be seen from fig. 1, the PL test spectrum after 1month (1 mole later) is substantially consistent with the spectrum of the initial (origin), and it can be seen that the perovskite solution of the present application has excellent stability properties.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is made in detail of a method for preparing perovskite luminescent material in situ, perovskite luminescent material and luminescent device provided in the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the above description of the examples is only for helping to understand the method and core ideas of the present application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A method for in situ preparation of perovskite luminescent material, comprising the steps of:
PbBr is prepared 2 Dissolving with CsBr in polar aprotic solvent to obtainA first mixed solution;
adding a p-fluorophenylethylamine bromine solution into the first mixed solution, uniformly mixing, and standing to obtain a second mixed solution;
and mixing the second mixed solution with chlorobenzene solution containing p-toluenesulfonic acid and oleic acid, centrifuging, standing, and taking supernatant to obtain perovskite luminescent material solution.
2. The method for in situ preparation of perovskite light emitting material according to claim 1, wherein the concentration of the first mixed solution is 0.1-1 mol/L; and/or
The PbBr 2 The molar ratio of CsBr to CsBr is 1:1-1.2.
3. The method of in situ preparation of perovskite light emitting material according to claim 1, wherein the polar aprotic solvent is N, N-dimethylformamide.
4. The method for in situ preparation of perovskite light emitting material according to claim 1, wherein the concentration of the p-fluorophenylethylamine bromine solution is 0.05-0.6 mol/L.
5. The method for in situ preparation of perovskite light emitting material according to claim 1 or 4, wherein the solvent of the p-fluorophenylethylamine bromine solution is N, N-dimethylformamide.
6. The method of in situ preparation of perovskite light emitting material according to claim 1, wherein the molar ratio of toluene sulfonic acid to oleic acid is from 5 to 20:1.
7. the method for in situ preparation of perovskite light emitting material according to claim 1 or 6, wherein the total concentration of p-toluene sulfonic acid and oleic acid in the chlorobenzene solution is 0.05-0.6 mol/L.
8. The method for in-situ preparation of perovskite light emitting material according to claim 1, wherein the rotational speed of centrifugation is 6000-12000 rpm and the time of centrifugation is 5-20 min.
9. A perovskite luminescent material prepared by the method of preparing a perovskite luminescent material in situ according to any one of claims 1 to 8.
10. A light-emitting device comprising the perovskite light-emitting material according to claim 9.
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| CN110676390A (en) * | 2019-09-05 | 2020-01-10 | 厦门大学 | A method of perovskite surface modification and its application |
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| CN113224239A (en) * | 2021-03-15 | 2021-08-06 | 南开大学 | In-situ generated water and thermal stable passivation layer and perovskite solar cell with same |
| CN113130802A (en) * | 2021-03-26 | 2021-07-16 | 华南理工大学 | Blue light perovskite thin film, preparation thereof and inverted quasi-two-dimensional blue light perovskite light-emitting diode |
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| Tailoring the orientation of perovskite crystals viaadding two-dimensional polymorphs for perovskite solar cells;Guo Renjun;《Journal of Physics-Energy》;第2卷(第3期);全文 * |
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