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Organic electroluminescent device and display apparatus

An electroluminescent device and electroluminescent technology, which can be used in electric solid devices, electrical components, semiconductor devices, etc., and can solve problems such as triplet exciton annihilation and efficiency roll-off.

Pending Publication Date: 2020-11-03
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present disclosure is to provide an organic electroluminescent device and a display device to solve the problems of triplet exciton annihilation and efficiency roll-off in the existing structure

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  • Organic electroluminescent device and display apparatus
  • Organic electroluminescent device and display apparatus
  • Organic electroluminescent device and display apparatus

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Embodiment Construction

[0057] The embodiments herein may be embodied in many different forms. Those skilled in the art can easily understand the fact that the implementation and contents can be changed into various forms without departing from the gist and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited only to the contents described in the following embodiments. In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined arbitrarily with each other.

[0058] In the drawings, the size of constituent elements, the thickness of layers, or regions may be exaggerated for the sake of clarity. Therefore, any implementation of the present disclosure is not necessarily limited to the dimensions shown in the drawings, and the shapes and sizes of components in the drawings do not reflect true scales. In addition, the drawings schematically show ideal examples, and any implementation of...

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Abstract

The embodiment of the invention provides an organic light-emitting device and a display device. The organic light-emitting device comprises an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, wherein the light-emitting layer comprises a first light-emitting layer body, a second light-emitting layer body and a middle light-emitting layer body arranged betweenthe first light-emitting layer body and the second light-emitting layer body. The first light-emitting layer or the second light-emitting layer comprises a guest material doped in a host material; thefirst light-emitting layer and the second light-emitting layer are used for forming an exciplex, and the exciplex and the guest material meet the conditions: S1(AEX)-S1(B) >=0.1 eV, and T1(AEX)-T1 (B)>=0.1 eV. According to the invention, the separation of a luminescence center and a recombination center is effectively realized, a non-radiation effect is reduced, a trap effect of a TADF material on charges is reduced, triplet exciton annihilation is reduced, efficiency roll-off is avoided, and device performance is improved.

Description

technical field [0001] The present disclosure relates to, but is not limited to, the field of display technology, and in particular, to an organic electroluminescence device and a display device. Background technique [0002] Organic Light Emitting Device (OLED) is an active light-emitting device, which has the advantages of light emission, ultra-thin, wide viewing angle, high brightness, high contrast, low power consumption, and extremely high response speed. Promising next-generation display technology. An OLED includes an anode, a cathode, and an organic light-emitting layer disposed between the anode and the cathode. The light-emitting principle is to inject holes and electrons into the light-emitting layer from the anode and the cathode, respectively. When the electrons and holes meet in the light-emitting layer , electrons and holes recombine in the light-emitting layer to generate excitons, which emit light while transitioning from an excited state to a ground state....

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/00H10K50/11H10K2101/40H10K50/12H10K50/13H10K2101/10Y04S30/12Y02T90/167
Inventor 孙海雁杨绘耘张晓晋刘兴华
Owner BOE TECH GRP CO LTD
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