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Electron type phosphorus-oxygen derivative and electrophosphorescence luminescent device

An electrophosphorescence and light-emitting device technology, which is applied in the field of electronic phosphorous oxide derivatives and electrophosphorescence light-emitting devices, can solve the problem of carrier transport matching high glass transition temperature, inability to simultaneously achieve triplet energy level and low electron migration It can solve the problems of high triplet energy level, high thermal stability and high electron mobility.

Active Publication Date: 2015-02-25
WUHAN SUNSHINE OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a new type of organic semiconductor material, which can be used as a phosphorescent host and an electron transport material, and an electrophosphorescent light-emitting device, aiming at solving the problem of low electron migration of traditional organic semiconductor materials in the prior art. The problem of high efficiency, and the technical problems of high triplet energy level, carrier transport matching and high glass transition temperature cannot be achieved at the same time

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  • Electron type phosphorus-oxygen derivative and electrophosphorescence luminescent device
  • Electron type phosphorus-oxygen derivative and electrophosphorescence luminescent device
  • Electron type phosphorus-oxygen derivative and electrophosphorescence luminescent device

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Embodiment 1

[0032] Embodiment 1 of the present invention provides an electronic oxyphosphorus derivative, which is used as a phosphorescence host and an electron transport material. The general structural formula of the electronic oxyphosphorus derivative is as follows:

[0033]

[0034] Wherein, the R in the structural formula of the electronic phosphorus oxyderivative 1 , R 2 and R 3 All are one of the following heterocyclic substituents: H, benzimidazole, phenanthroimidazole, azacarbazole, quinoline, oxaline or thiadiazole. Specifically, the electronic oxyphosphine derivative provided in Embodiment 1 of the present invention, wherein the electronic oxyphosphine derivative has a triphenylphosphoryl group as the core, through three Different electron-transporting groups (R 1 , R 2 and R 3 ), effectively solve the carrier balance, and thus obtain a class of electron-type green phosphorescent host materials with high triplet state, high electron mobility and high thermal stability....

Embodiment 2

[0065] Based on the electronic phosphorus oxyderivative provided in Embodiment 1 of the present invention, Embodiment 2 of the present invention provides an electrophosphorescent light-emitting device, which is composed of several layers of organic materials, wherein the electrophosphorescent light-emitting device The material components of the transport layer or the light-emitting layer include the electron-type phosphorus oxyderivatives provided in Embodiment 1 of the present invention.

[0066] Specifically, the four compounds 4-(1-methylbenzimidazolyl)-triphenylphosphine, 4-(2-methylbenzimidazolyl)-triphenyl Phosphate, 3-(1-methylbenzimidazolyl)-triphenylphosphine, 3-(2-methylbenzimidazolyl)-triphenylphosphine (see Figure 2-5 The UV fluorescence and phosphorescence spectra of the four compounds shown in Figure 2) are used as green phosphorescent host materials to prepare electrophosphorescent light-emitting devices; the schematic diagram of the device structure can be fou...

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Abstract

The present invention discloses an electron type phosphorus-oxygen derivative and an electrophosphorescence luminescent device, wherein the electron type phosphorus-oxygen derivative adopts the triphenyl phosphorus oxygen group as the core, and the three benzene rings of the triphenyl phosphorus oxygen group are conjugated with different electron transport groups (R1, R2 and R3) through bonds so as to effectively solve the carrier balance, such that the electron type green light phosphorescence main body material with characteristics of high triplet state, high electron mobility and high thermal stability is obtained. In addition, the electrophosphorescence luminescent device selects the electron type phosphorus-oxygen derivative as the transmitting layer or the luminescence layer material of the components, such that the electrophosphorescence luminescent device has characteristics of high brightness, high efficiency and low roll-off.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, in particular to an electronic phosphorus oxide derivative and an electrophosphorescent light-emitting device. Background technique [0002] In 1987, Professor Deng Qingyun and Vanslyke used ultra-thin film technology to make a double-layer organic electroluminescent device ( Appl. Phys. Lett., 1987, 52, 913). [0003] In 1990, Burroughes et al. discovered the OLED with the conjugated polymer PPV as the light-emitting layer (Nature. 1990, 347, 539), and since then set off an upsurge in OLED research all over the world. [0004] Due to the influence of spin confinement, most of what we see in our daily life is fluorescence; the initial research on OLED technology mainly focused on the direction of fluorescent devices; however, according to the theory of spin quantum statistics, the maximum internal quantum efficiency of fluorescent electroluminescent devices Only 25%, while phosphorescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6506C07F9/6561C07F9/6509C07F9/6539C09K11/06H01L51/54
Inventor 王磊潘彪汪博穆广园
Owner WUHAN SUNSHINE OPTOELECTRONICS TECH CO LTD