Thermally Excited Delayed Fluorescence Host Material Based on Phosphine Heteroaryl Derivatives and Its Preparation Method and Application

A technology of aryl derivatives and delayed fluorescence, which is applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve the problems of easy quenching of molecules and low device efficiency, and improve electron injection and transmission capabilities , Improve efficiency, improve luminous efficiency and brightness

Active Publication Date: 2019-04-19
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that existing planar thermally excited delayed fluorescent dye molecules are prone to quenching, resulting in low device efficiency, and provides a thermally excited delayed fluorescent host material based on phosphine heteroaryl derivatives and its preparation method and application

Method used

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  • Thermally Excited Delayed Fluorescence Host Material Based on Phosphine Heteroaryl Derivatives and Its Preparation Method and Application
  • Thermally Excited Delayed Fluorescence Host Material Based on Phosphine Heteroaryl Derivatives and Its Preparation Method and Application
  • Thermally Excited Delayed Fluorescence Host Material Based on Phosphine Heteroaryl Derivatives and Its Preparation Method and Application

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specific Embodiment approach 1

[0059] Embodiment 1: The structural formula of the thermally excited delayed fluorescence host material based on phosphine heteroaryl derivatives in this embodiment is denoted as DPDPA; or denoted as DPDPSA; or Where X=S or O, Y=S or O, when X=Y=S, it is recorded as DPDPS 2 A; when X=S, Y=O, it is recorded as DPDPSOA; when X=Y=O, it is recorded as DPDPO 2 A; or denoted as DPDPP; or denoted as DPDPSP; or Where X=S or O, Y=S or O, when X=Y=S, it is recorded as DPDPS 2 P; when X=S, Y=O, it is recorded as DPDPSOP; when X=Y=O, it is recorded as DPDPO 2 p.

specific Embodiment approach 2

[0060] Specific embodiment two: The preparation method of the thermally excited delayed fluorescence host material based on phosphine heteroaryl derivatives described in specific embodiment one is as follows:

[0061] Add o-dibromoaryl compound, phenylphosphine dichloride, and n-butyllithium into tetrahydrofuran (THF) at a molar ratio of 1:(1~1.5):(2~4), under argon protection Under the condition of -60~-85℃, react for 1~3 hours, then pour into water, extract with dichloromethane to obtain the organic layer, dry the organic layer liquid, directly purify or vulcanize / and oxidize After further purification, a thermally excited delayed fluorescence host material based on phosphine heteroaryl derivatives is obtained; wherein the o-dibromoaryl compound is o-dibromobenzene or 2,3-dibromonaphthalene.

specific Embodiment approach 3

[0062] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the vulcanization process is: adding sulfur powder to the organic layer liquid, stirring and reacting at a temperature of 15-30°C for 0.5-2 hours, Complete vulcanization. Others are the same as in the second embodiment.

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Abstract

A thermally excited delayed fluorescent host material based on phosphine heteroaryl derivatives and its preparation method and application, which relate to a thermally excited delayed fluorescent host material and its preparation method and application. It aims to solve the technical problem that the existing planar heat-excited delayed fluorescent dye molecules are prone to quenching, resulting in low device efficiency. The structural formula of the thermally excited delayed fluorescence host material of the present invention is: Preparation method: add o-dibromoaryl compound, phenylphosphine dichloride, and n-butyllithium into tetrahydrofuran, mix well, and react under the protection of argon , and then poured into water, extracted with dichloromethane to obtain an organic layer, dried, purified directly or purified after sulfurization / and oxidation to obtain a thermally excited delayed fluorescence host material based on phosphine heteroaryl derivatives; wherein o-dibromoaryl The base compound is o-dibromobenzene or 2,3-dibromonaphthalene. The fluorescent host material based on the phosphine heteroaryl derivative is used in thermal excitation delayed fluorescence electroluminescent devices.

Description

technical field [0001] The invention relates to a heat-excited delayed fluorescent host material and a preparation method and application thereof. Background technique [0002] Due to its low starting voltage and high luminous efficiency, organic light-emitting diodes have attracted extensive research. As the third-generation flat-panel display and lighting technology, organic light-emitting diodes generally use phosphorescent dyes to construct phosphorescent electroluminescence. , but because the construction of phosphorescent dyes is often accompanied by the presence of noble metals, this increases the cost of preparation and is not environmentally friendly. Therefore, there is an urgent need for other types of dyes to replace phosphorescent dyes. Recently, thermally excited delayed fluorescence technology, known as the third generation of organic electroluminescent technology, has made great research progress. Thermally excited delayed fluorescent dyes can jump from thei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/6568C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07F9/65683C07F9/65685C09K2211/1096H10K85/657H10K50/121H10K50/11H10K2101/10
Inventor 许辉韩春苗
Owner HEILONGJIANG UNIV
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