Thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, preparation method and application thereof

A technology of aryl derivatives and delayed fluorescence, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc. Effects of Injecting Transport Capabilities, Inhibiting Interactions

Active Publication Date: 2017-06-13
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

Method used

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  • Thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, preparation method and application thereof
  • Thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, preparation method and application thereof
  • Thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, preparation method and application thereof

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Example Embodiment

[0059] Specific embodiment 1: The structural formula of the thermally excited delayed fluorescence host material based on the phosphine heteroaryl derivative of this embodiment is Denoted as DPDPA; or Recorded 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.

Example Embodiment

[0060] Specific embodiment 2: The preparation method of the thermally excited delayed fluorescence host material based on phosphine heteroaryl derivatives described in specific embodiment 1 is as follows:

[0061] Add the o-dibromoaryl compound, phenyl phosphine dichloride, and n-butyl lithium to tetrahydrofuran (THF) at a molar ratio of 1:(1~1.5):(2~4), and protect under argon. Under the condition of -60~-85℃, react for 1~3 hours, then pour it into water and extract with dichloromethane to obtain the organic layer. After drying the organic layer liquid, it is directly purified or vulcanized / oxidized. After purification, a thermally excited delayed fluorescence host material based on a phosphine heteroaryl derivative is obtained; wherein the o-dibromoaryl compound is o-dibromobenzene or 2,3-dibromonaphthalene.

Example Embodiment

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

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Abstract

The invention provides a thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, a preparation method and an application thereof and relates to the thermal excitation delayed fluorescence main material, the preparation method and the application thereof. The invention aims to solve the technical problem of low device efficiency caused by the easiness in quenching of the molecules of the present planar thermal excitation delayed fluorescence dye. The structural formula of the thermal excitation delayed fluorescence main material provided by the invention is as follows. The preparation method comprises the following steps: adding an o-dibromo aryl compound, dichlorophenyl phosphine and n-butyllithium into tetrahydrofuran; uniformly mixing and then reacting under argon protection; pouring into water; extracting with dichloromethane, thereby acquiring an organic layer; after drying, directly purifying or vulcanizing/and oxidizing and then re-purifying, thereby acquiring the thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, wherein the o-dibromo aryl compound is o-dibromo-benzene or 2,3-dibromo naphthalene. The thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives is applied to a thermal excitation delayed fluorescence electrofluorescence device.

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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IPC IPC(8): C07F9/6568C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07F9/65683C07F9/65685C09K2211/1096H10K85/657H10K50/121H10K50/11H10K2101/10
Inventor 许辉杨鹤韩春苗
Owner HEILONGJIANG UNIV
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