Electroluminescent material, preparation method of electroluminescent material, and light-emitting device

Abstract

The invention provides an electroluminescent material, a preparation method of the electroluminescent material, and a light-emitting device. The electroluminescent material is of an asymmetric structure, and a tetraphenyl ethylene structure with aggregation induced luminescence is connected with a perylene structure capable of achieving high efficiency by generating triplet state-triplet state fusion, so that the aggregation-induced quenching effect of the perylene structure is effectively inhibited, and film-state luminescence efficiency is improved. Meanwhile, a structure unit with high electron mobility is introduced to improve the carrier transmission balance and increase the composite probability, so that the electroluminescent material which can emit blue light and has high electroluminescent efficiency is achieved, and the preparation method of the electroluminescent material, and the light-emitting device are achieved.

Description

technical field [0001] The present application relates to the display field, in particular to an electroluminescence material, a preparation method of the electroluminescence material and a light emitting device. Background technique [0002] In the device structure, traditional fluorescent materials can only use singlet excitons, and their external quantum efficiency does not exceed 5%. However, blue light molecules such as anthracene and perylene with rigid planar structures can achieve triplet-triplet fusion. 11% external quantum efficiency, however, the π-π stacking of this structure is tight, which has a serious concentration quenching effect, resulting in a greatly reduced film-state fluorescence quantum efficiency and general electroluminescent efficiency. Therefore, it is necessary to provide a An electroluminescent material with high luminescent efficiency, a preparation method of the electroluminescent material, and a light-emitting device. Contents of the invent...

AI Technical Summary

Problems solved by technology

[0002] In the device structure, traditional fluorescent materials can only use singlet excitons, and their external quantum efficiency does not exceed 5%, while blue light molecules such as anthracene and perylene with rigid planar structures can achieve triplet-triplet fusion. 11% external quantum efficiency, however, the π-π stacking of this structure is tight, which has a serious concentration quenching effect, resulting in a greatly reduced film-state fluorescence quantum efficiency, and general electroluminescent efficiency. Therefore, it is necessary to provide an electroluminescent Electroluminescent material with high luminescent efficiency, preparation method of electroluminescent material, and light-emitting device

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