Compounds and Organic Electroluminescent Devices

Abstract

The present invention provides a novel organic electroluminescence material used in an organic electroluminescence device, and an organic electroluminescence device using the novel organic electroluminescence material. The novel organic electroluminescent material of the present invention is represented by the following formula (I).

Description

technical field [0001] The invention relates to a new organic heterocyclic compound which can be used as an organic electroluminescent material, in particular to a compound containing anthracene structure and its application in organic electroluminescent devices. Background technique [0002] At present, with the continuous advancement of OLED technology in the two major fields of display and lighting, people pay more attention to the research of its core materials. As core materials, common functional organic materials include: hole injection materials, hole transport materials, hole blocking materials, electron injection materials, electron transport materials, electron blocking materials, and luminescent host materials and luminescent objects (dye). [0003] Various types of electron transport materials with strong transport capacity and high stability have been reported in previous articles and patents. Generally speaking, electron-transporting materials are compounds w...

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Problems solved by technology

Generally speaking, electron-transporting materials are compounds with electron-deficient nitrogen-containing heterocyclic groups. Most of them have high electron affinity, so they have a strong ability to accept electrons. , common electron transport materials such as AlQ 3 The electron mobility of (octahydroxyquinoline aluminum) is much lower than the hole mobility of the hole transport material, so in the OLED device, on the one hand, it will cause the gap between the holes and electrons caused by the unbalanced injection and transport of carriers. The recombination probability of the device is reduced, thereby reducing the luminous efficiency of the device. On the other hand, the electron transport material with lower electron mobility will lead to an increase in the operating voltage of the device, thereby affecting the power efficiency, which is not good for energy saving.

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