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Blue organic electroluminous material and its preparation method and application

A milky white, hydroxyquinoline technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of high color purity, high purity, high yield and high purity

Inactive Publication Date: 2006-08-09
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the current research status of blue organic luminescent materials, the problem solved by the present invention is that when the blue electroluminescent materials are doped with fluorescent dyes to achieve blue light emission, the stability is not high enough, the film-forming property is poor, and it is difficult to match the energy level of the matrix. Prone to phase separation and poor stability due to steric hindrance or coordination number unsaturation

Method used

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  • Blue organic electroluminous material and its preparation method and application
  • Blue organic electroluminous material and its preparation method and application
  • Blue organic electroluminous material and its preparation method and application

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Experimental program
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Embodiment 1

[0023] Embodiment 1: the acetone solution of 40ml, 0.5M 8-hydroxyquinoline is added in the there-necked flask, then slowly drip into 4.2ml triethylamine, then slowly drip into 0.5M, 30ml lithium sulfate aqueous solution, temperature keeps Stir at about 70°C for 2 hours and let stand for 24 hours to obtain milky white needle-like crystals, wash with deionized water, ethanol or acetone several times, filter, and dry at 80°C to obtain Liq. Yield 67.1%.

Embodiment 2

[0024] Embodiment 2: the acetone solution of 40ml, 0.5M 8-hydroxyquinoline is added in the there-necked flask, then slowly drip into 7ml triethylamine, then slowly drip into 0.5M, 30ml lithium sulfate aqueous solution, the temperature is maintained at Stir at about 70°C for 2 hours and let stand for 24 hours to obtain milky white needle-like crystals, wash with deionized water, ethanol or acetone several times, filter, and dry at 80°C to obtain Liq. Yield 71.2%.

Embodiment 3

[0025] Embodiment 3: the ethanol solution of 40ml, 0.5M 8-hydroxyquinoline is added in the there-necked flask, then slowly drip into 7ml triethylamine, then slowly drip into 0.5M, 30ml lithium sulfate aqueous solution, the temperature is maintained at Stir at about 70°C for 2 hours and let stand for 24 hours to obtain milky white needle-like crystals, wash with deionized water, ethanol or acetone several times, filter, and dry at 80°C to obtain Liq. Yield 44.5%.

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Abstract

An organic electroluminescent material emitting blue light for the organic electroluminescent device is prepared through preparing the solution of 8-hydroxy quinoline in alcohol or acetone, adding triethyleneamine and aqueous solution of lithium sulfate, heaitng while stirring for reaction, filtering, washing and baking. Its advantages are high output rate and purity, high luminescent efficient and color purity, and high thermal stability.

Description

technical field [0001] The invention relates to an organic electroluminescent material, in particular to a blue organic electroluminescent material and its preparation method and application. The invention belongs to the technical field of electronic materials. technical background [0002] In 1987, C.W.Tang et al. from the American Kodak Company used Alq 3 A sandwich-type double-layer organic electroluminescent device (OLED) was successfully prepared as the light-emitting layer and aromatic diamine as the hole transport layer (Tang.C.W, etal.Appl.Phys.Lett.1987, 51, 913). In 1988, the S. Sato research group of Kyushu University in Japan prepared a sandwich-type low-voltage EL device using small organic molecules as the light-emitting layer. (Adachi C, Tokito S, Tsutsui T, et al. Jpn J Appl. Phys, 1988, 27, L713). In 1990, J.H.Burroughes and others at the University of Cambridge in the United Kingdom developed polymer diodes. (Burroughes J H, Bradley D DC, Brown A R, et ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06
Inventor 许并社郝玉英王华郝海涛周禾丰刘旭光李洁
Owner TAIYUAN UNIV OF TECH
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