Compound having general formula and application to organic electroluminescence

Abstract

The invention discloses a compound applied to organic electroluminescent devices and application. The compound is shown by the general formula in the description, wherein R<1> and R<2> are the same or different, and each of R<1> and R<2> is independently selected from hydrogen, halogen, substituted or unsubstituted C1 to C10 alkyl, and substituted or unsubstituted C6 to C30 aryl; Ar<1> to Ar<4> are the same or different, and each of the Ar<1> to Ar<4> is independently selected from hydrogen, halogen, C1 to C10 alkyl, substituted or unsubstituted C6 to C30 aryl, and substituted or unsubstituted C2 to C30 heteroaryl. According to the invention, an organic amine unit is replaced with a carbazole structural unit, the oxidation resistance of the material is improved and the defects of the material such as easy discoloration can be overcome. A generated cyclic polyamide structure has extremely high thermodynamics and chemical stability and can meet the requirements that the material does not decompose in a vapor deposition process, thereby affecting the performance of the devices; an adopted 1,2,4,5-tetracarboxylic acid structure can ensure sufficient electron affinity, so as to enable the material to have strong electron injection performance; the compound has a good intermolecular interaction effect, and can ensure that the material has higher electron transport performance.

Description

technical field [0001] The invention relates to a novel organic compound and its application in the technical field of organic electroluminescence display. Background technique [0002] At present, with the increasing maturity of OLED technology and the continuous advancement in the display field, in order to further enhance the competitiveness of OLED technology, the development of OLED materials and novel device structures that can effectively improve OLED device efficiency, life, and reduce driving voltage are even more important. is of great significance. [0003] Excellent new materials can significantly reduce the cost of the screen body and improve the efficiency and lifespan, thus attracting more attention to the research on its core materials. Chemists have made outstanding contributions in this regard, designing and developing various Structural functionalized materials. In general, electron transport materials are compounds with electron-deficient nitrogen-conta...

AI Technical Summary

Problems solved by technology

The use in organic electroluminescent devices will change the conductivity of the entire device, and the electron and hole charge mobility in the device will be unbalanced, which will affect the stability of the device, resulting in a decrease in device performance or even failure.

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