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Electroluminescent diode and display device

An electroluminescence and diode technology, applied in the field of electronic display, can solve the problems of quantum dot charging, reducing quantum dot light-emitting diode, Auger recombination, etc.

Inactive Publication Date: 2021-08-13
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carrier imbalance often leads to non-radiative luminescence problems such as charging of quantum dots and Auger recombination, and also affects the luminous efficiency and life of the device.
However, if the electron injection ability of quantum dot light-emitting diodes is reduced in order to balance carrier injection, the life of the diode will be reduced.

Method used

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  • Electroluminescent diode and display device
  • Electroluminescent diode and display device
  • Electroluminescent diode and display device

Examples

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preparation example Construction

[0080] An embodiment of the present invention also provides a method for preparing an electroluminescent diode with an inverted structure, comprising the following steps:

[0081] providing a substrate, forming a cathode on the substrate;

[0082] Forming a light-emitting layer on the cathode, the light-emitting layer is a quantum dot light-emitting layer;

[0083] Form the first hole conduction layer and the second hole conduction layer on the light-emitting layer. As a preferred specific example of this embodiment, the first hole conduction layer is formed on the side close to the light-emitting layer, and the second hole conduction layer and then formed on the first hole conduction layer; in other specific examples, the formation sequence of the two layers can also be adjusted;

[0084] An anode is formed on the second hole conducting layer.

[0085] Wherein, optionally, in the process of forming the cathode, the following steps are also included: forming a first electron...

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Abstract

The invention discloses an electroluminescent diode and a display device. The electroluminescent diode includes a cathode, a light emitting layer, a hole transport layer, and an anode. The hole transport layer is provided with a hole injection regulation and control structure, the hole injection regulation and control structure comprises a first hole conduction layer and a second hole conduction layer which are stacked, and the material of the second hole conduction layer is the material used by the P-type doped first hole conduction layer. The hole injection regulation and control structure can significantly improve the hole injection performance in the electroluminescent diode so as to balance the number of carriers in the electroluminescent diode, thereby effectively improving the luminescence performance and prolonging the service life of the electroluminescent diode.

Description

technical field [0001] The invention relates to the technical field of electronic display, in particular to an electroluminescence diode and a display device. Background technique [0002] Electroluminescent diodes can directly convert electrical energy into light energy, and have been widely used in human daily production and life. Quantum dot light-emitting diode (QLED) is a new type of electroluminescent diode that is gradually emerging, which uses quantum dots as the light-emitting layer. The luminescence wavelength of quantum dots can be adjusted by controlling the particle size of quantum dots. In addition, quantum dots also have the advantages of narrow luminescence spectrum linewidth, high color purity, high electron mobility, good photostability, and can be used for flexible displays. Therefore, Quantum dot light-emitting diodes with quantum dots as the light-emitting layer are widely used in the field of light-emitting displays. [0003] In traditional quantum do...

Claims

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Application Information

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IPC IPC(8): H01L51/50
CPCH10K50/156H10K50/166H10K50/826H10K50/17H10K2102/321H10K50/16H10K50/82H10K50/115H10K77/111H10K2102/00H10K2102/311H10K2102/3026
Inventor 龚浩天黄景升庄锦勇
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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