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Electroluminescent material, preparation method of electroluminescent material and luminescent device

An electroluminescent material and light-emitting layer technology, applied in the field of lighting, can solve problems such as low efficiency, achieve high efficiency, increase the rate of intersystem crossing and inverse intersystem crossing, and reduce the energy level difference of the first single triplet state. Effect

Inactive Publication Date: 2019-09-13
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology

[0002] In the prior art, organic light emitting diodes (Organic Light Emitting Diode) have self-luminous properties, and the materials that dominate their light emission are mainly electroluminescent materials. However, the current electroluminescent materials that emit red light have low efficiency. Therefore, It is necessary to provide an electroluminescent material with high efficiency and capable of emitting deep red light, a preparation method of the electroluminescent material and a light-emitting device

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[0033] The following will clearly and completely describe the technical solution in the application with reference to the accompanying drawings in the implementation manner of the application. Apparently, the described implementations are only some of the implementations of this application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0034] The application provides an electroluminescent material. The structural formula of the electroluminescent material is: R 2 -R 1 -R 2 . The R1 structure is One of. The R 2 The structural formula is One of.

[0035] The electroluminescent material is a deep red photothermally activated delayed fluorescence (Thermally Activated Delayed Fluorescence, TADF) material. by the R 1 and the R 2 The permutation and combination of the electrolumi...

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Abstract

The invention provides an electroluminescent material, a preparation method of the electroluminescent material and a luminescent device. A first intermediate is generated from a first reactant and a second reactant through a reaction, and the electroluminescent material is generated from the first intermediate and a third reactant through a reaction. A phenanthrene nucleus electron acceptor of theelectroluminescent material comprises two nitrogen atoms, so that not only are the rigidity and the electron withdrawing capability of the electron acceptor improved, but also velocities of intersystem crossing and anti-intersystem crossing can be increased, the overlapping degree of a highest occupied molecular orbital and a lowest occupied molecular orbital of molecules can be reduced, a smallfirst single triplet-state energy level difference and a high photoluminescence quantum yield can be achieved, and furthermore, the electroluminescent material which is high in efficiency and capableof emitting dark red light, and the preparation method of the electroluminescent material and the luminescent device, can be achieved.

Description

technical field [0001] The present application relates to the lighting field, in particular to an electroluminescent material, a preparation method of the electroluminescent material and a light emitting device. Background technique [0002] In the prior art, organic light emitting diodes (Organic Light Emitting Diode) have self-luminous properties, and the materials that dominate their light emission are mainly electroluminescent materials. However, the current electroluminescent materials that emit red light have low efficiency. Therefore, It is necessary to provide an electroluminescent material capable of emitting deep red light with high efficiency, a preparation method of the electroluminescent material and a light emitting device. Contents of the invention [0003] The application provides an electroluminescent material, a preparation method of the electroluminescent material and a light-emitting device, so as to realize the electroluminescent material and device wi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/14C09K11/06H01L51/50H01L51/54
CPCC07D471/14C09K11/06C09K2211/1007C09K2211/1029C09K2211/1033C09K2211/1037C09K2211/1044H10K85/6572H10K85/657H10K50/11
Inventor 王彦杰
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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