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Organic charge transporting material and preparation method therefor

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, and achieve the effect of easy preparation, good thermal stability, and simple purification process

Active Publication Date: 2016-03-23
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

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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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  • Organic charge transporting material and preparation method therefor
  • Organic charge transporting material and preparation method therefor
  • Organic charge transporting material and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1, an organic charge transport material, which is based on derivatives of tetraphenyl silicon and butoxydibenzothiophene, the structure is shown in formula I:

[0029]

[0030] Name: Bis{4-[4-(2,8-dibutoxy-2',8'-dibutoxy)(dibenzo[b,d]thienyl)phenyl]}diphenylsilane .

[0031] The preparation method of above-mentioned derivative is as follows:

[0032] .

[0033] 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 for 1 hour, then automatically heat up and react 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 l...

Embodiment 2

[0036] Embodiment 2, an organic charge transport material, which is based on derivatives of tetraphenyl silicon and butoxydibenzothiophene, the structure is shown in formula I:

[0037]

[0038] Name: Bis{4-[4-(2,8-dibutoxy-2',8'-dibutoxy)(dibenzo[b,d]thienyl)phenyl]}diphenylsilane .

[0039] The preparation method of above-mentioned derivative is as follows: .

[0040] 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°C, and add 112.5mL of n-butyllithium dropwise After the dropwise addition was completed, stir at -78°C for 1 hour, then slowly add 71.14 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 200ml of water, 200ml of concentrated hydrochloric acid, and 300ml of petroleum ether into the reaction fla...

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Abstract

The invention discloses an organic charge transporting material which has a structure represented by a formula shown in the description. The organic charge transporting material disclosed by the invention is a hole-transporting material in an OLED apparatus. By using tetraphenyl-silicon as a main body, dibenzothienyl groups with hole-transporting ability are connected to para-positions of tetraphenyl-silicon. In order to better adjust the HOMO energy level, butoxy goups with electron donating ability are introduced onto the dibenzothienyl groups, so that the HOMO energy level of the material is improved, the glass transition temperature of the material is improved, and the material has a relatively high energy level in a triplet state and has excellent hole-transporting ability. The material disclosed by the invention is simple in preparation process and provides an excellent material for OLED display and illumination.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent display, and more specifically relates to derivatives of tetraphenylsilicon and butoxydibenzothiophene, an organic charge transport material, and its preparation. 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 excit...

Claims

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Application Information

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IPC IPC(8): C07F7/08H01L51/54
CPCC07F7/0812H10K85/40
Inventor 史永文王作鹏谢英王金荣郭艳云王海云王永峰
Owner 山东盛华新材料科技股份有限公司
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