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A kind of blue fluorescent luminescent material and its application

A luminescent material and blue fluorescent technology, which is applied in the field of blue fluorescent luminescent materials, can solve the problems of few types of blue light materials and low device life, and achieve the effects of increasing photoelectric conversion efficiency, improving luminous performance, and increasing quantity

Active Publication Date: 2017-03-01
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are fewer types of efficient blue light materials and lower device lifetimes

Method used

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  • A kind of blue fluorescent luminescent material and its application
  • A kind of blue fluorescent luminescent material and its application
  • A kind of blue fluorescent luminescent material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Preparation of blue fluorescent luminescent material TPEPAnOMeCN

[0044] 1) 4-Bromo-4 ， -Synthesis of Chlorobenzophenones

[0045]Add 4-bromobenzoic acid (10g, 0.05mol), dichloromethane (100ml), oxalyl chloride (8.18g, 0.065mol, 6ml) into the three-necked flask, stir at 25°C, and the system turns into a white cloudy liquid. Quickly drop 1-2 drops of N,N-dimethylformamide (DMF) into the system, and a large number of bubbles are observed, and the reaction is violent. Stir at 25°C for 30 minutes. Heating, the bath temperature was set to 45°C, the system became clear after 30 minutes of reaction, and the reaction was continued for 1.0 hours. To remove the solvent, measure 20ml of monochlorobenzene to dissolve the product after the solvent removal. Anhydrous aluminum trichloride (0.0575 mol, 7.58 g) was added in 3 portions. The bath temperature was set to 120°C, under nitrogen protection, a large amount of hydrochloric acid gas was generated during this period...

Embodiment 2

[0081] Example 2 Application of blue fluorescent luminescent material TPEPAnOMeCN in organic electroluminescent devices

[0082] This embodiment prepares organic electroluminescence device according to the following method:

[0083] a) Cleaning ITO (indium tin oxide) glass: ultrasonically clean the ITO glass with deionized water, acetone, and ethanol for 30 minutes each, and then treat it in a plasma cleaner for 15 minutes;

[0084] b) Vacuum evaporation of a hole transport layer NPB on the anode ITO glass with a thickness of 50nm;

[0085] c) On the hole transport layer NPB, vacuum evaporate the luminescent layer TPEPAnOMeCN with a thickness of 30nm;

[0086] d) On top of the light-emitting layer TPEPAnOMeCN, an electron transport layer TPBI is vacuum-evaporated with a thickness of 40 nm;

[0087] e) On the electron transport layer TPBI, the electron injection layer LiF is vacuum evaporated, with a thickness of 1 nm;

[0088] f) On the electron injection layer LiF, a catho...

Embodiment 3

[0090] Example 3 Application of blue fluorescent luminescent material TPEPAnOMeCN in organic electroluminescent devices II

[0091] This embodiment prepares organic electroluminescence device according to the following method:

[0092] a) Cleaning ITO (indium tin oxide) glass: ultrasonically clean the ITO glass with deionized water, acetone, and ethanol for 30 minutes each, and then treat it in a plasma cleaner for 15 minutes;

[0093] b) Vacuum evaporation or solution film-forming hole transport layer TAPC on the anode ITO glass, with a thickness of 50nm;

[0094] c) On top of the hole transport layer TAPC, vacuum evaporate the luminescent layer TPEPAnOMeCN with a thickness of 30nm;

[0095] d) On the light-emitting layer TPEPAnOMeCN, an electron transport layer TmPyPB is vacuum-evaporated with a thickness of 40 nm;

[0096] e) On top of the electron transport layer TmPyPB, an electron injection layer LiF is vacuum evaporated with a thickness of 1 nm;

[0097] f) On the el...

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Abstract

The invention relates to a blue fluorescent light-emitting material and its application. From the perspective of molecular design, the invention takes tetraphenylethylene as the core and introduces electron-donating and electron-absorbing structures containing anthracene groups on both sides of the molecule. Tetraphenylethylene has the property of aggregation-induced luminescence, which can effectively solve the phenomenon of fluorescence quenching caused by molecular aggregation. Anthracene is a stable and efficient blue-light fluorescent group. The introduction of two anthracene structures can not only increase the number of chromophores, but also increase the relative molecular mass of the molecule, increase the glass transition temperature of the molecule, and enhance the thermal stability of the molecule. The introduction of D (donating electron)-A (electron withdrawing) group can effectively promote the charge transfer in the molecule and improve the luminescence performance of the molecule. Experimental results show that the material has good thermal stability and electroluminescent properties, and can be used as a light-emitting layer of a blue organic electroluminescent device to obtain blue light emission with better color purity and efficiency.

Description

technical field [0001] The invention relates to a blue fluorescent luminescent material and its application, and relates to the technical field of organic photoelectric materials. Background technique [0002] Organic electroluminescence is a research hotspot in the world today. In the information age where the international situation is changing rapidly and the Internet is rapidly popularizing, people have put forward higher requirements for modern display technology. Organic electroluminescent devices (OLEDs) have the advantages of high luminous efficiency, low driving voltage, fast response, rich colors, ultra-thin and portable, and large viewing angles. Focus on the object. With the rapid development of OLED technology, new luminescent material systems (fluorescent materials and phosphorescent materials), new device structures (bottom emission and top emission), organic electronics theory, organic semiconductor theory, organic optoelectronic integration and device stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/23C09K11/06C07C43/205C07C43/225C07C255/54H01L51/54
Inventor 李庆张学衡肖立新陈志坚龚旗煌王志刚
Owner VALIANT CO LTD
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