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A kind of bipolar organic electroluminescent material and its application

An electroluminescent material and electroluminescent device technology, applied in the application of the material in the field of organic electroluminescence, the field of small molecule organic electroluminescent materials, can solve the problem that the color purity, efficiency and life of blue light devices need to be improved, blue light The device development is not mature enough to achieve good performance and good device efficiency.

Active Publication Date: 2018-01-19
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In small molecule organic electroluminescent devices, compared with red and green devices, the development of blue devices is not yet mature, and the color purity, efficiency and life of blue devices need to be improved

Method used

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  • A kind of bipolar organic electroluminescent material and its application
  • A kind of bipolar organic electroluminescent material and its application
  • A kind of bipolar organic electroluminescent material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of embodiment 1 intermediate 3

[0036]

[0037] Preparation of compound 1:

[0038] In a 100mL round-bottom flask equipped with a constant pressure dropping funnel, a thermometer, and a stirring magnet, dissolve 0.1mol of p-bromobenzaldehyde in 20mL of ethanol and add 5mL of 10% NaOH aqueous solution under ice-bath cooling and stirring conditions, After mixing evenly, wait for the temperature to drop to room temperature, and slowly add 0.1 mol of acetophenone solution dropwise. Maintain the reaction temperature between 15-20°C, stir the reaction for 3 hours, after cooling, filter with suction, recrystallize with toluene-absolute ethanol, filter and dry to obtain compound 1, 23.1 g of light yellow solid, yield 80.5%, MS (m / s): 286.0.

[0039] Preparation of compound 2:

[0040] In a 500mL three-necked flask, add compound 1 (57.4g, 0.2mol), phenylhydrazine (26.0g, 0.24mol), KOH (22.4g, 0.4mol), absolute ethanol (300g), N 2 Protect, heat up to reflu...

Embodiment 2

[0043] Example 2 Preparation of Compound C01

[0044]

[0045] In a 250mL three-necked flask, add compound 4 (1.43g, 5mmol), compound 3 (5.10g, 12mmol), K 2 CO 3 (5.5g, 40mmol), toluene (85mL), deionized water (24mL), N 2 protection, adding Pd(PPh 3 )4 (320 mg), heated to reflux, reacted for 16 hours, stopped the reaction, lowered the temperature, separated, washed once with 50 mL deionized water, collected the organic phase, and removed the solvent. The obtained crude product was purified by silica gel column chromatography, and the eluent was n-hexane : Dichloromethane=5:1 (V / V), obtain target object C01, crude product weight 2.4g, use chemical vapor deposition system for further sublimation purification, sublimation temperature 350 ℃, obtain 1.9g target object C01, yield 79.1%.

[0046] High resolution mass spectrometry, ESI source, positive ion mode, molecular formula C 54 h 42 N 4 o 2 S, theoretical value 810.3061 test value 810.2667. Elemental analysis (C 54 ...

Embodiment 3

[0047] The preparation of embodiment 3 compound C03

[0048]

[0049] Using Compound 6 and Compound 5 as raw materials, according to the method described in Example 2, Compound C03 was synthesized with a yield of 61.1%. High resolution mass spectrometry, ESI source, positive ion mode, molecular formula C 43 h 32 N 2 o 2 S, theoretical value 640.22 test value 640.32.

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Abstract

The present invention relates to a bipolar organic electroluminescent material and its application. This type of material includes a molecular structure conforming to formula (I) or / and formula (II). The material has a relatively high glass transition temperature, molecular The thermal stability and suitable molecular energy levels can improve the efficiency and lifespan, so that the driving lifespan of the device can be greatly improved, and the preparation is easy and the cost is low. It can be used as a light-emitting material and applied in the field of organic electroluminescence.

Description

technical field [0001] The present invention relates to a bipolar organic electroluminescent material and its application, in particular to a small molecule organic electroluminescent material having a structure of pyrazoline and diphenyl sulfone, and to the application of the material in the field of organic electroluminescence . Background technique [0002] The research on organic electroluminescent devices began in the 1960s, and OLEDs did not flourish until the end of the 1980s. OLED has the advantages of full solid-state, low-voltage drive, active light emission, fast response, wide viewing angle, large light-emitting area, light-emitting wavelength covering the entire visible light region, and rich colors. It has great advantages in the field of full-color large-area display and has become an extremely Flat panel display devices in the foreground. At present, organic electroluminescent technology is mainly used in two fields, namely full-color display and white ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06H01L51/54
CPCC09K11/06C09K2211/1044C09K2211/1018H10K85/00H10K50/11
Inventor 张江峰付文岗林存生盛磊安仲霖柳晓明
Owner VALIANT CO LTD