Compound for organic luminescent material and method for producing the same

A technology of light-emitting materials and compounds, applied in the fields of light-emitting materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of easy crystallization of materials, reduced light-emitting performance, and reduced light-emitting life of devices, and achieve the effect of good carrier transport performance.

Inactive Publication Date: 2008-05-07
DONGGUAN ANWELL DIGITAL MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. Poor carrier transport performance leads to reduced luminescence performance;
[0007] Generally, the ideal amorphous film needs to have a high glass transition temperature Tg, and materials with low Tg are easy to crystallize, which leads to a decrease in the luminous lifetime of the device

Method used

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  • Compound for organic luminescent material and method for producing the same
  • Compound for organic luminescent material and method for producing the same
  • Compound for organic luminescent material and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of N-substituted carbazole:

[0028] Combine carbazole (1mmol, 0.167g), sodium tert-butoxide (1mmol, 0.96g), tert-butyl phosphine (0.02mmol, 0.0011g), bromoethane (1mmol, 0.11g), Pd(dba) 2 , (0.005mmol, 0.0028g) was added to a dry nitrogen-filled reaction system, 30ml xylene was added, heated to 100-120°C, and fully stirred to react for 2-3 hours. The temperature was lowered to room temperature, an appropriate amount of xylene was added for dilution, the organic layer was thoroughly washed with water, separated into layers, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure to obtain the product.

[0029] (2) Preparation of N-substituted-3.6-dibromocarbazole:

[0030] Add NBS (2mmol, 0.356g), N'N-dimethylformamide (10mmol, 0.73g), and N-substituted carbazole (1mmol, 0.195g) into the reactor, and react at room temperature for three hours. Post-treatment: wash the reaction solution with brine, separate the layers, dry wit...

Embodiment 2

[0038] As in the other operations of Example 1, the bromoethane used in step (1) is replaced with bromobenzene. When the reaction temperature is 70°C, compound (2) is obtained. Its structural formula and physicochemical parameters are as follows:

[0039] 9-Phenyl-N,N’-dinaphthyl-N,N’-diphenyl-3,6-diaminocarbazole (2)

[0040]

[0041] Glass transition temperature: 123°C; absorption spectrum λmax=351nm;

[0042] Fluorescence spectrum λmax=487nm; solution fluorescence quantum yield Φ=0.07

Embodiment 3

[0044] As in the other operations of Example 1, the phenylnaphthylamine used in step (3) was replaced with pyrenylphenylamine (0.586g, 2.0mmol), and the reaction temperature was 90℃ to obtain compound (3), structural formula and physicochemical The parameters are as follows:

[0045] 9-ethyl-N,N'-dipyrenyl-N,N'-diphenyl-3,6-diaminocarbazole (3)

[0046]

[0047] Glass transition temperature: 174℃; absorption spectrum λmax=408nm;

[0048] Fluorescence spectrum λmax=548nm; solution fluorescence quantum yield Φ=0.03

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Abstract

The invention relates to a compound for organic luminous material, and comprises a structure of carbazole derivative substituted by arylamines. The compound has quite high glass transition temperature, and Tg ranges from 120 to 200 DEG C; and the thermal decomposition temperature is also quite high, and Td is higher than 450 DEG C. The invention has good carrier transport performance, and the luminous wavelength changes from green light to blue light, ranging from 400 to 560nm.

Description

Technical field [0001] The invention belongs to the technical field of organic luminescent materials, and relates to an organic electroluminescent material containing a substituted carbazole group and a preparation method thereof. Background technique [0002] Organic Light Emitting Display (Organic Light Emitting Display, OLED for short) is a newly emerging category on mobile phone screens, MP3 and MP4 screens, and is known as the "dream display." OLED display technology is different from traditional LCD display methods. It does not require a backlight and uses very thin organic material coatings and glass substrates. When current flows through, these organic materials will emit light, so OLED screens can be made lighter and thinner , The viewing angle is larger, and can significantly save power. [0003] The current OLED materials have the following shortcomings: [0004] 1. Low glass transition temperature; [0005] 2. Low thermal decomposition temperature; [0006] 3. Poor ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/88C09K11/06
Inventor 李恒王健徐宁
Owner DONGGUAN ANWELL DIGITAL MASCH CO LTD
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