Organic light-emitting material and device containing anthracene and benzimidazole structure

Abstract

The invention provides an organic light-emitting material and device containing anthracene and benzimidazole structure and belongs to the technical field of organic light-emitting materials. The organic light-emitting material containing anthracene and benzimidazole structure is provided; anthracene ring is blue light structure of excellent performance, having high triplet energy level and wide energy gap, benzimidazole groups are connected in molecules, electron transport capacity is improved, and carrier transfer is balanced. Compared with the prior art, the organic light-emitting material containing anthracene and benzimidazole structure has high light-emitting efficiency when applied to organic light-emitting devices, especially as a blue guest material in a light-emitting layer.

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to an organic electroluminescence material containing anthracene and benzimidazole structures and an organic light-emitting device thereof. Background technique [0002] Organic electroluminescence refers to the phenomenon that organic materials are excited by electric current and electric field to emit light under the action of electric field. Organic light-emitting diodes (OLEDs) are a next-generation display technology that utilizes this phenomenon to realize displays. Since Tang C.W. and Vanslyke S.A. of American Kodak Company produced the first organic electroluminescent device with excellent performance in 1987, organic electroluminescent displays have attracted great interest due to their advantages. [0003] At present, red and green luminescent materials have been commercially used due to their excellent performance. Relatively speaking, blue light...

AI Technical Summary

Problems solved by technology

Relatively speaking, blue light-emitting materials are relatively scarce. Although materials such as Firpic, represented by blue phosphorescent luminescent materials, have high luminous efficiency, their lifespan is short and the efficiency rolls off seriously, which limits their further applications.

Although blue-light fluorescent guest materials generally have a long lifespan, they need materials with both a wide energy gap and high thermal stability, which is the difficulty in the development of blue-light fluorescent guest materials.

Images