Multi-element ring-containing compound, application and organic electroluminescent device

Abstract

The invention discloses a multi-element ring-containing compound, application and an organic electroluminescent device. The molecular design is carried out on the multi-element ring-containing compound, so that low molecular LUMO energy level (-4.0 to -6.0 ev) is effectively realized, and the LUMO energy level of the molecule can be well matched with the HOMO of a hole transport material, when themulti-element ring-containing compound is used as a hole doping material in the organic electroluminescent device, the hole concentration and the hole mobility can be effectively improved, and the hole transmission and injection efficiency can be improved. Meanwhile, through accurate regulation and control of the molecular structure, the molecule has good thermal stability, low volatility and high decomposition temperature, and can be uniformly and stably distributed in a specific functional layer.

Description

technical field

[0001] The invention shows the technical field, and specifically relates to a compound containing multiple rings, its application and an organic electroluminescence device. Background technique

[0002] Organic electroluminescent (OEL) devices (hereinafter referred to as "OEL" devices) have a series of advantages such as self-luminescence, high contrast, wide color gamut, wide viewing angle, and fast response. In 1963, Pope et al. first discovered the phenomenon of electroluminescence of organic compounds [JChemPhys,38:2042]. In 1987, C.T.Tang et al. first invented the OEL device, and realized low-voltage, high-brightness luminescence [ApplPhysLett,1987,51: 913].

[0003] Current OEL devices generally include opposite cathodes and anodes and one or more organic layers sandwiched between the two electrodes. Electrons and holes are respectively injected into the organic layer from the cathode and the anode, and finally recombine in the organic light-emitting ...

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