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Preparation method of pure organic phosphorescent polymer material for flexible pled light-emitting layer

A technology of optical polymers and light-emitting layers, applied in the direction of light-emitting materials, chemical instruments and methods, can solve the problems of expensive phosphorescent metal chelates, difficulty in adjusting the light-emitting area, and easy phase separation, etc., to achieve good solubility, Good thermal stability, low cost effect

Inactive Publication Date: 2016-05-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic-metal chelate phosphorescent materials have the following disadvantages: the heterogeneous system is prone to phase separation during use, the light-emitting region is difficult to adjust to deep blue and near ultraviolet regions, and the phosphorescent metal chelate is more expensive.
This greatly limits its application in the PLED light-emitting layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a pure organic phosphorescent polymer material for a flexible PLED light-emitting layer, the specific steps are as follows:

[0017] 1) 1,4-dibromo-2,5-divinylbenzene / styrene copolymer (P 1 ) preparation

[0018] Dissolve 24.64g of styrene and 8.21g of 1,4-dibromo-2,5-divinylbenzene in 80mL of tetrahydrofuran under nitrogen protection, wherein 1,4-dibromo-2,5-divinylbenzene and styrene The mass ratio of is 1:3, and adds 0.37g benzoyl peroxide (BPO) as initiator, wherein the mass ratio of BPO and 1,4-dibromo-2,5-divinylbenzene is 1:67, THF was removed after reflux reaction for 24h, and the obtained solid was washed with n-hexane and dried to obtain the copolymer (P 1 ).

[0019] 2) 4-bromo-2,5-divinylacetophenone / styrene copolymer (P 2 ) preparation

[0020] Add 4.11g LiCl and its equivalent isopropylmagnesium chloride (iPrMgCl) to 80mLTHF under nitrogen protection. The amount of isopropylmagnesium chloride is 0.5 times that of 1,4-dibromo-2,5...

Embodiment 2

[0023] A method for preparing a pure organic phosphorescent polymer material for a flexible PLED light-emitting layer, the specific steps are as follows:

[0024] 1) 1,4-dibromo-2,5-divinylbenzene / styrene copolymer (P 1 ) preparation

[0025] Under the protection of nitrogen, 26.76g of styrene and 13.38g of 1,4-dibromo-2,5-divinylbenzene were dissolved in 150mL of n-hexane, wherein 1,4-dibromo-2,5-divinylbenzene and benzene The mass ratio of ethylene is 1:2, and 0.27g of benzoyl peroxide (BPO) is added as an initiator, wherein the mass ratio of BPO to 1,4-dibromo-2,5-divinylbenzene is 1:100 After reflux reaction for 24h, normal hexane was removed, and the obtained solid was washed with normal hexane and dried to obtain the copolymer (P 1 ).

[0026] 2) 4-bromo-2,5-divinylacetophenone / styrene copolymer (P 2 ) preparation

[0027] Add 13.38g LiCl and its equivalent isopropylmagnesium chloride (iPrMgCl) to 150mLTHF under the protection of nitrogen. The amount of isopropylmag...

Embodiment 3

[0030] A method for preparing a pure organic phosphorescent polymer material for a flexible PLED light-emitting layer, the specific steps are as follows:

[0031] 1) 1,4-dibromo-2,5-divinylbenzene / styrene copolymer (P 1 ) preparation

[0032] Dissolve 3.01g of styrene and 6.02g of 1,4-dibromo-2,5-divinylbenzene in 100mL of ethanol under nitrogen protection, wherein 1,4-dibromo-2,5-divinylbenzene and styrene The mass ratio of is 1:0.5, and adds 0.03g benzoyl peroxide (BPO) as initiator, wherein the mass ratio of BPO and 1,4-dibromo-2,5-divinylbenzene is 1:200, After reflux reaction for 25h, ethanol was removed, and the obtained solid was washed with normal hexane and dried to obtain the copolymer (P1 ).

[0033] 2) 4-bromo-2,5-divinylacetophenone / styrene copolymer (P 2 ) preparation

[0034] Add 9.03g LiCl and its equivalent isopropylmagnesium chloride (iPrMgCl) to 100mLTHF under nitrogen protection. The amount of isopropylmagnesium chloride is 1.5 times that of 1,4-dibromo...

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Abstract

The invention relates to a preparation method of a pure organic phosphorescent polymer material for a flexible polymer light-emitting display (PLED) luminescent layer. By adopting the method, a bromine aromatic carbonyl pure organic phosphorescent polymer material, 4-bromo-2,5-divinyl benzene ethyl ketone / styrene copolymer, is successfully synthetized by employing a grignard exchange method on the basis of a home-made phosphorescent polymer precursor 1,4-dibromo-2,5-divinyl benzene / styrene copolymer. No expensive raw material containing heavy metal is utilized; the organic phosphorescent polymer material is low in preparation cost, and suitable for being used as a PLED luminescent layer material, and has good heat stability (half-decomposition temperature is higher than 400 DEG C), and good photoelectric property and dissolving property. In addition, the prepared phosphor material is a homogeneous system, and is not easily separated; a phosphorescent emission peak has an obvious hypochromatic shift; the material has phosphorescence at room temperature or higher temperature and in an amorphous state; the defect that the existing pure organic phosphorescent material does not have a phosphorescent light at the room temperature or in the amorphous state is overcome; the traditional organic-metal chelate phosphorescent material can be replaced.

Description

technical field [0001] The invention relates to a method for preparing a pure organic phosphorescent polymer material for a flexible PLED light-emitting layer, and belongs to the technical field of photoelectric display device materials. Background technique [0002] In recent years, organic light-emitting display technology has become a third-generation display technology with broad development prospects and great influence. Compared with traditional liquid crystal display (Liquid Crystal Display, LCD), organic light emitting display (Organic Light Emitting Display, OLED) has ultra-light, ultra-thin, high brightness, large viewing angle (up to 170°), self-illumination, fast response speed (about LCD 1000 times), high definition, low calorific value, excellent shock resistance, low manufacturing cost, bendable and other advantages. According to the different materials of the light-emitting layer, OLED can be divided into: organic small molecule light-emitting devices and or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F212/34C08F8/26C09K11/06
Inventor 贺英蔡计杰何超奇唐先斌施周邱细妹王均安
Owner SHANGHAI UNIV