A kind of organic charge transport material that can be used for OLED display and preparation method thereof

A charge transport, organic technology, applied in the direction of organic chemistry, silicon organic compounds, chemical instruments and methods, etc., can solve the problem of no contribution to electroluminescence, achieve good thermal stability, improve charge transport performance, reduce agglomeration and mutual The effect of action

Active Publication Date: 2017-12-15
山东盛华新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So in most organic molecules, phosphorescence from radiative transitions of triplet excitons contributes little to electroluminescence

Method used

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  • A kind of organic charge transport material that can be used for OLED display and preparation method thereof
  • A kind of organic charge transport material that can be used for OLED display and preparation method thereof
  • A kind of organic charge transport material that can be used for OLED display and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1, an organic charge transport material that can be used for OLED display, the material is a derivative based on tetraphenylsilicon and amyloxydibenzothiophene, and its structure is shown in formula I:

[0028]

[0029] The preparation method of above-mentioned derivative is as follows:

[0030] .

[0031] The preparation of intermediate II: under the protection of argon, add 74.2g of bis(4-bromophenyl)-phenylsilane and 50ml of tetrahydrofuran to the three-necked flask successively, cool to -78°C, add 225mL of n-butyllithium dropwise, After the dropwise addition was completed, stir at -78°C for 1 hour, then slowly add 124.28 g of tributyl borate dropwise, after the dropwise addition, keep warm and react for 1 hour, the temperature will rise automatically, and the reaction will last overnight. Add 400ml of water, 400ml of concentrated hydrochloric acid, and 550ml of petroleum ether into the reaction flask, and stir for 2h. The organic layer was washed twic...

Embodiment 2

[0034] Example 2, an organic charge transport material that can be used for OLED display, the material is a derivative based on tetraphenylsilicon and pentoxydibenzothiophene, and its structure is shown in formula I:

[0035]

[0036] The preparation method of above-mentioned derivative is as follows:

[0037] .

[0038] The preparation of intermediate II: under the protection of argon, add 37.1g of bis(4-bromophenyl)-phenylsilane and 30ml of tetrahydrofuran to the three-necked flask successively, cool to -78 ℃, add dropwise 113mL) of n-butyllithium , the dropwise addition was completed, stirred at -78°C for 1 hour, then slowly added 62.14 g of tributyl borate dropwise, after the dropwise addition was completed, the temperature was automatically raised after 1 hour of heat preservation reaction, and the reaction was carried out overnight. Add 200ml of water, 200ml of concentrated hydrochloric acid, and 300ml of petroleum ether into the reaction flask, and stir for 2h. T...

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Abstract

The invention discloses an organic charge transport material that can be used for OLED display, which has the following structure: The invention is a hole transport material in an OLED device, with tetraphenyl silicon as the main body, and its para-position connection has Dibenzothiophene with hole transport ability, in order to better adjust the HOMO energy level, introduce pentyloxy groups with electron donating ability on dibenzothiophene, improve the HOMO energy level of the material, increase its glass transition temperature, and have a higher High triplet energy level, and has excellent hole transport ability. The preparation process of the invention is simple, and excellent materials are provided for OLED display and lighting.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence display, and more specifically relates to an organic charge transport material that can be used for OLED display and a preparation method thereof. Background technique [0002] Due to its ability to utilize triplet and singlet excitons, the internal quantum efficiency of phosphorescent organic light-emitting diodes (OLEDs) can theoretically reach 100%, which has attracted close attention from scholars and experts in the industry. [0003] Organic electroluminescent materials are divided into two categories: organic electroluminescent materials and organic electrophosphorescent materials. Fluorescence and phosphorescence are both processes of radiation transitions, and the final state of the transition is the ground state. The difference between the two lies in the transition of the former The initial state is an excited singlet state, while the latter is an excited triplet stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/08H01L51/54
CPCC07F7/0812C07F7/083H10K85/40
Inventor 史永文王作鹏谢英王金荣郭艳云张文清张琼
Owner 山东盛华新材料科技股份有限公司
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