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Single white light polymer and organic light-emitting material, and organic light-emitting device and preparation method of organic light-emitting device

A polymer and luminescent technology, applied in the direction of luminescent materials, electrical solid devices, chemical instruments and methods, etc., can solve immature problems, achieve simple preparation procedures, improve device efficiency, and reduce triplet exciton quenching Effect

Active Publication Date: 2017-09-01
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concept of solution-processable TADF polymers is still immature, especially polymer backbones with TADF properties and all-TADF single white light polymer materials based on such backbones are rarely reported.

Method used

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  • Single white light polymer and organic light-emitting material, and organic light-emitting device and preparation method of organic light-emitting device
  • Single white light polymer and organic light-emitting material, and organic light-emitting device and preparation method of organic light-emitting device
  • Single white light polymer and organic light-emitting material, and organic light-emitting device and preparation method of organic light-emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A single white light polymer (SWPB0.2R0.05) provided in this embodiment has a structural formula as shown below.

[0065]

[0066] The embodiment of the present invention also provides a method for preparing the above-mentioned single white photopolymer (SWPB0.2R0.05):

[0067] S1: Under the protection of nitrogen gas, add carbazole (10.0g, 59.8mmol) and sodium hydride (1.72g, 72.0mmol) to dry dimethylformamide, stir at room temperature for 30 minutes, then add 4,4'- Difluorophenylsulfoxide (15.2g, 60mmol) was stirred for 3h, the solvent was removed, and the residue was washed with deionized water and ethanol to obtain intermediate product 1 (18.2g, yield 76%). The intermediate product 1 is identified and analyzed by a mass spectrometer, and the result is: mass spectrum (EI): m / z C 24 h 16 FNO 2 S theoretical value: 401.4; measured value: 401(M) + , which proves that the intermediate product 1 is C 24 h 16 FNO 2 S.

[0068] S2: Under nitrogen protection, add ...

Embodiment 2

[0088] A single white light polymer (SWPB0.3R0.05) provided in this embodiment has a structural formula as shown below.

[0089]

[0090]This embodiment also provides a method for preparing the above-mentioned single white photopolymer (SWPB0.3R0.05), the operation of which is the same as the preparation method provided in Example 1, and only the operating conditions are changed.

[0091] When preparing intermediate product 1, the molar ratio of carbazole to sodium hydride and 4,4'-difluorophenyl sulfoxide was 1:1:1, and the stirring time was 28 minutes and 3.2 hours, respectively.

[0092] When preparing intermediate product 2, the molar ratio of 3,6-di-tert-butylcarbazole and sodium hydride to intermediate product 1 is 1:1.1:1. The stirring time was 32 minutes.

[0093] When preparing intermediate product 3, the molar ratio of 5,10-dihydrophenazine and palladium acetate is 9:1, and the consumption of degassed toluene is 18mL, K 2 CO 3 The consumption amount of the aque...

Embodiment 3

[0111] A single white photopolymer (SWPV0.4R0.1) provided in this embodiment has a structural formula as shown below.

[0112]

[0113] This embodiment also provides an organic electroluminescent material, which is mainly prepared from the single white photopolymer (SWPV0.4R0.1) in this embodiment and the single white photopolymer (SWPB0.3R0.05) in Example 2.

[0114] This embodiment also provides an organic electroluminescent device, the light emitting layer of which is mainly prepared from the above electroluminescent material. Specifically, its structure is ITO / PEDOT:PSS(40nm) / SWPV0.4R0.1, SWPB0.3R0.05(60nm) / TPBi(20nm) / Ca(10nm) / Al(100nm).

[0115] This embodiment also provides a method for preparing an organic electroluminescence device, the preparation method is the same as the preparation method provided in Example 1, the only difference is that the operating conditions are changed.

[0116] The mass concentration of the organic electroluminescent material in the chlo...

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Abstract

The invention relates to the field of photoelectric technological materials, and specifically relates to a single white light polymer and an organic light-emitting material, and an organic light-emitting device and a preparation method of the organic light-emitting device. The single white light polymer is capable of emitting blue and orange thermal activation delayed fluorescence at the same time. The organic light-emitting material is capable of realizing the situation of upwards converting triplet excitons into singlet excitons, triplet exciton quenching caused by concentration in an emission layer is reduced.

Description

technical field [0001] The invention relates to the field of photoelectric technology materials, in particular to a single white light polymer, an organic electroluminescence material, an organic electroluminescence device and a preparation method thereof. Background technique [0002] At present, related research on TADF materials and devices mainly focuses on improving efficiency and luminous color. Many small TADF materials and devices have been reported, and the efficiency is close to the theoretical external quantum efficiency. However, most of the reports on TADF materials are small molecules that can be prepared by evaporation method. Reports on solution processing are mainly limited to doping small molecule TADF materials in host materials to form host-guest doping systems, which are then prepared by solution methods. However, this kind of host-guest doping system has been proved to have some insurmountable disadvantages when using the solution method to prepare th...

Claims

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Application Information

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IPC IPC(8): C08G61/12C09K11/06H01L51/54
CPCC09K11/06C08G61/122C08G61/123C08G61/124C08G2261/95C08G2261/316C08G2261/5222C08G2261/344C08G2261/143C08G2261/145C08G2261/149C08G2261/122C09K2211/1466C09K2211/1475H10K85/151Y02B20/00
Inventor 王金山侯海军张苏苏刘超贺盟王成双姜翠凤李广西陈迪李情兰
Owner YANCHENG INST OF TECH
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