Quinoxaline unit containing organic thermally activated delayed fluorescent material and application thereof

A thermally induced delayed fluorescence, quinoxaline technology, applied in luminescent materials, organic chemistry, electrical components, etc., can solve the problems of expensive heavy metal materials, need to improve the stability, affecting practical use, etc., to achieve low attenuation, high-efficiency electroplating Luminous performance, high stability effect
CN106047337AActive Publication Date: 2016-10-26深圳智材有机光电有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳智材有机光电有限公司
Publication Date
2016-10-26

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Abstract

The invention relates to a quinoxaline unit containing organic thermally activated delayed fluorescent material and an application thereof. The organic thermally activated delayed fluorescent material, which contains a quinoxaline unit and has good light emitting performance, is obtained through carrying out multiaspect modification by taking quinoxaline with high electrophilicity as a core and constructing different D-A structures by particularly introducing fluorine atoms with high electro-withdrawing power to molecular design for the first time, so that efficient light-emitting elements are obtained, and the thinking of people that conventional fluorescent materials are free of halogens is broken through. The organic thermally activated delayed fluorescent material is simple in synthesis and high in yield and has the advantages of practical large-scale production and application. The [delta]E(S1-T1) of the organic thermally activated delayed fluorescent material is not greater than 0.65eV, so that the organic thermally activated delayed fluorescent material can be applied to the evaporation-coating of devices and can also be applied to the spin-coating of the devices. Electroluminescent elements and luminescent devices with high efficiency, high brightness, low-efficiency attenuation and low trigger voltage are provided through using the novel thermally activated delayed fluorescent material, so that the organic thermally activated delayed fluorescent material can be extensively applied to the field of organic electroluminescence.
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Description

technical field

[0001] The invention belongs to the field of organic luminescent materials, and relates to an organic heat-induced delayed fluorescent material containing quinoxaline units and its application in organic electroluminescent devices. Background technique

[0002] Organic light-emitting diodes (OLEDs) have the advantages of self-illumination, wide viewing angle, fast response, and flexible display, etc., and have great application prospects in the field of display and lighting, and have attracted more and more attention. .

[0003] Organic electroluminescence can be divided into fluorescence and phosphorescence electroluminescence. The first-generation organic electroluminescent materials are ordinary fluorescent materials, because they can only use 25% of the energy from singlet excitons, so the external quantum efficiency of their devices cannot break through the bottleneck of 5%, which affects their practical use. The second generation is organic phosphores...

Claims

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