Organic electroluminescent device, display panel and display device

An electroluminescent device and electroluminescent technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of reducing luminous efficiency, hindering TTF, etc., to improve utilization, improve performance, and widen exciton recombination area. Effect

Pending Publication Date: 2022-06-07
BOE TECH GRP CO LTD
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  • Claims
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Problems solved by technology

In addition, the blue fluorescent material is generally a single-bias material, and the excitons gather at the interface between the hole transport layer and the light-emitting layer, and there is a phenomenon of TPA (Triplet-Polaronannihilation, triplet-polaron quenching), which is prone to T1 -T1 quenching, the TPA phenomenon will hinder the TTF phenomenon, resulting in a decrease in luminous efficiency

Method used

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  • Organic electroluminescent device, display panel and display device
  • Organic electroluminescent device, display panel and display device
  • Organic electroluminescent device, display panel and display device

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

[0033] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated ...

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Abstract

The invention discloses an organic light-emitting device, a display panel and a display device. The organic light-emitting device comprises an anode layer and a cathode layer opposite to the anode layer. A first light emitting layer disposed between the anode layer and the cathode layer, the first light emitting layer including a first host material and a first guest material; a second light emitting layer disposed between the first light emitting layer and the cathode layer, the second light emitting layer including a second host material and a second guest material; wherein the triplet energy level of the first host material is greater than the triplet energy level of the second host material. The organic light-emitting device provided by the embodiment of the invention is provided with the first light-emitting layer and the second light-emitting layer, the organic light-emitting device is a double-light-emitting-layer device, the triplet energy level of the main body material of the first light-emitting layer is larger than that of the main body material of the second light-emitting layer, an exciton recombination region is separated from a TTF region, the proportion of TPA is reduced, and the light-emitting efficiency of the organic light-emitting device is improved. And the luminous efficiency of the organic electroluminescent device can be improved.

Description

technical field [0001] The present invention generally relates to the field of display technology, and specifically relates to an organic electroluminescence device, a display panel and a display device. Background technique [0002] Organic Light-Emitting Diode (OLED) is a device that uses a multilayer organic thin film structure to generate electroluminescence, because of its self-luminescence, low driving voltage, high brightness, wide viewing angle, high contrast and response speed In recent years, it has received extensive attention from academia and industry, and it is one of the current research hotspots. [0003] RGB (red, green and blue) are the three primary colors for full-color display. At present, green light basically meets the needs of commercialization. However, red light and blue light still have the problems of low luminous efficiency and poor color purity. Among them, the technical problems of blue light are more serious. Obviously, there is still a long ...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/10H10K50/11H10K2101/40H10K50/13Y02B20/30
Inventor 张小梅马立辉周辉杜小波
Owner BOE TECH GRP CO LTD
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