Heterocyclic compound and organic electroluminescent device comprising same

Abstract

The invention provides a heterocyclic compound and an organic electroluminescent device containing the heterocyclic compound, and relates to the technical field of organic electroluminescence. The heterocyclic compound disclosed by the invention has good film-forming property and thermal stability and relatively high glass-transition temperature, and the service life of the device can be prolonged when the heterocyclic compound is applied to an organic layer of the organic electroluminescent device; meanwhile, the structure has a deep HOMO energy level, so that holes can be effectively prevented from diffusing from the light-emitting layer to the electron transport layer and the recombination probability of the holes and electrons in the light-emitting layer can be effectively improved; and when the heterocyclic compound provided by the invention is applied to the electron transport or hole blocking layer, the light-emitting efficiency of a device can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a heterocyclic compound and an organic electroluminescence device containing it. Background technique [0002] The electroluminescent device (EL device) is a self-luminous device, which has the advantages of providing a wider viewing angle, a larger contrast ratio and a faster response time, and has a very high research and development value and a wide range of application prospects . [0003] An organic EL device (OLED) converts electric energy into light by applying electric power to an organic light-emitting material, and generally includes an anode, a cathode, and an organic layer formed between the two electrodes. The organic layers of an OLED can include a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer (containing a host material and a dopant material), an electron buffer layer, a hole blocking layer, an...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the current problem that the hole mobility of the hole transport material is higher than the electron mobility of the electron transport material, some holes are easy to pass through the light-emitting layer and recombine with electrons, resulting in a decrease in device efficiency and a shortened service life. Provided is a heterocyclic compound and an organic electroluminescence device containing the same, which is applied to the hole blocking layer of the organic electroluminescence device, which can effectively block the holes in the light-emitting layer, and improve the flow rate of electrons and holes in the light-emitting layer. recombination probability, thereby improving the luminous efficiency of organic electroluminescent devices and prolonging the service life of the devices

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