Heteroanthracene derivative and application thereof, and organic electroluminescent device

Abstract

The invention discloses a heteroanthracene derivative and a preparation method and application thereof, and an organic electroluminescent device. According to the heteroanthracene derivative, at leastone site selected from site 2, site 3 and site 7 of a heteroanthracene group is substituted by a hole transport type group, and the heteroanthracene derivative has a parent nucleus structure of heteroanthracene, so a D-A type compound or a hole transport type compound with a star-shaped spatial configuration is formed; the substitution of multi-site aromatic groups and the star-shaped configuration enable the derivative to have better stability and a balanced electron / hole transport rate in device preparation and application; and as a light-emitting host material or hole transport material ofan organic light-emitting device, the derivative has higher quantum recombination efficiency, can effectively solve the problems of electron / hole imbalance and easy crystallization in a device, emitspurer light color, and has more remarkable advantages than similar compounds and compounds in the prior art in the aspects of starting voltage, current efficiency, service life and thermal stability.

Description

technical field [0001] The invention relates to the field of photoelectric materials, in particular, the invention relates to a xanthene derivative and its application and an organic electroluminescent device. Background technique [0002] OLED stands for Organic Light Emitting Diode, also known as Organic Laser Display. OLED has the characteristics of self-illumination. It uses a very thin organic material coating and glass substrate. When the current passes through, the organic material will emit light, and the OLED display screen has a large viewing angle and can significantly save power. Therefore, OLED is regarded as One of the most promising products of the 21st century. However, so far, OLED devices have not been widely used, and the efficiency of the device is an important reason for restricting their popularization. [0003] In OLED devices, the design and combination of the light-emitting layer play a key role in the performance of the device, which directly dete...

AI Technical Summary

Problems solved by technology

[0004] On the basis of the existing technology, the present invention aims at industrialization, and aims to develop an OLED material with xanthene group as the core, solve the problem of electron / hole migration mismatch in the material layer, and then significantly improve the efficiency of the device. Comprehensive performance in terms of luminous efficiency, lifetime, color coordinates, etc.

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