Bipolar green phosphorescent host material and organic electroluminescent device

A technology of electroluminescent devices and green phosphorescence, which is applied in the direction of luminescent materials, electric solid devices, semiconductor devices, etc., can solve the problems of late start and achieve the effects of increasing torque, reducing crystallinity, and reducing coplanarity
CN112442044AInactive Publication Date: 2021-03-05NANJING TOPTO MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING TOPTO MATERIALS CO LTD
Publication Date
2021-03-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a bipolar green phosphorescent host material and an organic electroluminescent device. The structural formula of the material is as shown in the specification. Compared with acontrast example, the organic electroluminescent device prepared from the bipolar green phosphorescent host material has the advantages that: the voltage is greatly reduced, and the luminous efficiency is remarkably improved. Therefore, the bipolar green phosphorescent host material disclosed by the invention can greatly reduce the driving voltage of the device, greatly reduces the consumption ofelectric energy and remarkably improves the luminous efficiency. In addition, by reducing the driving voltage, the service life of the organic electroluminescent device is remarkably prolonged.
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Description

technical field

[0001] The invention relates to the field of organic electroluminescence materials, and specifically relates to a bipolar green phosphorescence host material and an organic electroluminescence device. Background technique

[0002] Organic electroluminescence is a phenomenon that electric energy excites organic materials to emit light. The light-emitting layer composed of light-emitting materials is the most critical part of light-emitting devices, so light-emitting materials are crucial to organic electroluminescence. Usually, the luminescent material needs to meet the following requirements: good semiconductor characteristics, capable of conducting electrons or holes; the fluorescence spectrum is in the visible region of 280-780nm, and the fluorescence quantum yield is high; the chemical properties are stable, and it is difficult to have side reactions with other materials; film-forming properties Good, easy to form dense amorphous film and not easy to cryst...

Claims

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