Aromatic amine derivative, and preparation method, use and organic electroluminescent device thereof

Abstract

The embodiment of the invention provides an aromatic amine derivative, and a preparation method, a use and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescence. The aromatic amine derivative is invented to improve the film forming ability and the redox repetition stability. The structural general formula I of the aromatic amine derivative is shown in the specification; and in the formula I, R1, R2, R3 and R4 respectively independently represent hydrogen, substituted or unsubstituted C1-C40 alkyl groups, substituted or unsubstituted C1-C40 alkyloxy groups, substituted or unsubstituted C3-C40 cycloalkyl groups, substituted or unsubstituted C6-C50 aryl groups, substituted or unsubstituted C3-C50 heteroaryl groups containing one or two selected from hetero atoms of N, O or S, or substituted or unsubstituted C10-C40 fused aryl groups, m, n, p and q respectively independently represent 0, 1, 2, 3, 4 or 5, and substituent can be one or more groups selected from halogens, C1-C10 alkyl groups, C1-C10 alkyloxy groups, C3-C20 cycloalkyl groups, C6-C20 aryl groups or C4-C20 heteroaryl groups. The aromatic amine derivative can be used in the organic electroluminescent device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an aromatic amine derivative, its preparation method, application, and an organic electroluminescence device. Background technique [0002] Organic light emitting diode (OrganiC Light Emitting Diode, OLED) refers to the technology that organic semiconductor materials emit light under the action of electric field, because of its active light emission, all solid state, low driving voltage, high efficiency, fast response speed, wide viewing angle and simple manufacturing process And it can realize many advantages such as large area and flexible display, and has broad application prospects in flat panel display and lighting. [0003] Generally known OLED device structures include a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer. In order to improve the luminous efficiency and service life of OLED devices,...

AI Technical Summary

Problems solved by technology

For example, the triaryl amine substances invented during the development of photocopying technology in the early days have high carrier mobility, but the glass transition temperature is low and the film-forming properties are not good, which is not conducive to the preparation of organic electroluminescent devices.

Another example is the pentacene compound, which shows high carrier mobility, but this kind of substance has a high HOMO energy level, and its redox repeatability is not stable enough, that is, the life of the organic electroluminescent device is not high.

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