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A kind of aryl silicon organic photoelectric material and its preparation method and application

An organic optoelectronic material, aryl technology, applied in the direction of light-emitting materials, organic chemistry, chemical instruments and methods, etc., can solve the problem of scarcity of high-efficiency dark blue PhOLEDs, etc., achieve simple preparation and synthesis process, low start-up voltage, and high yield Effect

Active Publication Date: 2021-07-02
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, solution-processed red, green, and blue PhOLEDs with high efficiency and good device stability have been successfully fabricated, but solution-processed high-efficiency deep-blue PhOLEDs with an external quantum efficiency (EQE) exceeding 20% still very scarce

Method used

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  • A kind of aryl silicon organic photoelectric material and its preparation method and application
  • A kind of aryl silicon organic photoelectric material and its preparation method and application
  • A kind of aryl silicon organic photoelectric material and its preparation method and application

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preparation example Construction

[0026] The preparation method of the aryl silicon organic photoelectric material DSiDCzSi provided by the invention comprises the following steps:

[0027] Step S1: Under the protection of nitrogen, first dissolve 3-bromo-9H carbazole in anhydrous tetrahydrofuran, and then add n-butyllithium to react for 1h-1.2h at a low temperature of 0°C to prepare a reaction system, in which 3-bromo The molar ratio of -9H carbazole to n-butyllithium is 1:1-1.5;

[0028] Step S2: Add diphenyldichlorosilane to the reaction system of step S1, and react at a low temperature of 0°C for 1h-1.2h, wherein the molar ratio of 3-bromo-9H carbazole to diphenyldichlorosilane is 2- 2.5:1, then warmed up to room temperature to continue the reaction for 12 hours, extracted and purified to obtain the compound bis(3-bromo-9H-carbazol-9-yl)diphenylsilane;

[0029] Step S3: Under nitrogen protection, first dissolve the bis(3-bromo-9H-carbazol-9-yl)diphenylsilane prepared in step S2 in anhydrous tetrahydrofura...

Embodiment

[0032] Take a single-necked flask, add 3.0g of 3-bromo-9H carbazole, seal it and pump nitrogen repeatedly three times, inject and dissolve 40mL of anhydrous tetrahydrofuran (THF) under a nitrogen atmosphere, and then put it into an ice-cold flask at 0°C / Cool in a water bath for 15 minutes. Measure 8.3 mL of n-butyl lithium in n-hexane solution (1.6 M) with a syringe, add it dropwise into the reaction bottle, and react at 0° C. for 1.0 h to obtain a reaction system. Add 1.1 mL of diphenyldichlorosilane to the reaction system, react at 0° C. for 1.0 h, and then rise to room temperature for 12 h. The reaction solution was quenched with 50 mL of water, extracted with 3×200 mL of dichloromethane solution, and the organic phase was collected and dried over anhydrous sodium sulfate. The dichloromethane solution was spun out with a rotary evaporator. Then the crude product was dissolved in 50mL of dichloromethane, added silica gel powder and then spin-dried the solvent, and purifi...

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Abstract

The invention provides an aryl silicon organic photoelectric material and its preparation method and application. The preparation method is to react 3-bromo-9H carbazole with diphenyldichlorosilane at low temperature to obtain the compound bis(3- bromo-9H-carbazol-9-yl) diphenylsilane intermediate, and then react the intermediate with n-butyllithium, and then add chlorotriphenylsilane to prepare aryl silicon organic photoelectric material DSiDCzSi. The present invention is easy to purify, has high synthetic yield, has good thermal stability, solubility and film-forming property, and also has higher triplet state energy level; The electroluminescence device has high external quantum efficiency, low turn-on voltage and stable electroluminescence performance. The invention is of great significance to the development of low-cost, high-efficiency and stable organic light-emitting diodes.

Description

technical field [0001] The invention relates to a polymer material, in particular to an aryl silicon organic photoelectric material and its preparation method and application, belonging to the technical field of organic photoelectric materials. Background technique [0002] Organic light-emitting diodes (Organic light-emitting diodes, OLEDs), as a new type of flat panel display technology, has the advantages of wide viewing angle, ultra-thin, fast response, high luminous efficiency, and flexible display, and is called "" "Fantastic display" is recognized globally as the next generation mainstream display after liquid crystal display. Phosphorescent organic light-emitting diodes (PhOLEDs) have attracted great attention in the industry because they can utilize singlet and triplet excitons at the same time, and can theoretically achieve 100% internal quantum efficiency. So far, solution-processed red, green, and blue PhOLEDs with high efficiency and good device stability have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/10C09K11/06H01L51/50H01L51/54
CPCC07F7/10C09K11/06C09K2211/1007C09K2211/1014C09K2211/1029H10K85/6572H10K85/40H10K50/121
Inventor 陈润锋职怡缤李欢欢蒋云波
Owner NANJING UNIV OF POSTS & TELECOMM
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