Organic electroluminescent device and display device

By adopting a dual-body luminescent layer structure in an OLED device, using the high hole mobility and suitable energy level of the first body material, combined with the specific energy level of the second body material, the carrier distribution inside the luminescent layer is accurately regulated, and the problems of efficiency, life and cost of existing OLED products are solved, and higher photoelectric performance is achieved.

CN114430016BActive Publication Date: 2025-03-28GUAN ETERNAL MATERIAL TECH
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Patent Information

Application Number
CN202011181935.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-10-29
Publication Date
2025-03-28
Estimated Expiration
2040-10-29

AI Technical Summary

Technical Problem

The existing OLED materials and device structures cannot fully solve the problems of OLED product efficiency, life and cost, and it is urgent to develop higher-performance OLED devices.

Method used

The organic electroluminescent device adopts a dual-body luminescent layer. The first body material has a high hole mobility and a suitable energy level. It adjusts the carrier distribution inside the luminescent layer, and matches the second body material to accurately regulate the carrier distribution, thereby improving the light extraction efficiency.

Benefits of technology

The photoelectric performance of organic electroluminescent devices has been significantly improved, with the current efficiency reaching above 11.7cd/A, most of which can reach above 15cd/A, and up to above 17cd/A.

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Abstract

The present invention relates to an organic electroluminescent device and a display device, wherein the organic electroluminescent device comprises an anode layer, a cathode layer, and an organic layer arranged between the anode layer and the cathode layer; the organic layer comprises a light-emitting layer, wherein the light-emitting layer contains a main material and a doping material; the main material comprises a first main material and a second main material, wherein the first main material has a structure shown in Formula I. The present invention can effectively adjust the carrier distribution inside the light-emitting layer by selecting a first main material with a specific structure, thereby regulating the carrier recombination area, and has a relatively high spatial stacking structure, and is combined with a second main material to accurately regulate the distribution of carriers inside the light-emitting layer, thereby improving the light extraction efficiency of the organic electroluminescent device, and further improving the photoelectric performance of the device.
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