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Electroluminescent device and preparation method thereof, display device and lighting equipment

A technology for electroluminescent devices and light-emitting layers, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc. Efficiency and lifespan, etc., to reduce the difficulty of hole transport, improve luminous efficiency and lifespan, and improve hole injection and transport efficiency.

Pending Publication Date: 2021-08-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy level matching between functional layers greatly affects the carrier injection and transport, which in turn affects the efficiency and lifetime of organic light-emitting diode devices
In the prior art, the HOMO energy level of the hole transport layer in the organic light emitting diode device is fixed, which affects the carrier transport and affects the efficiency and life of the organic light emitting diode device

Method used

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  • Electroluminescent device and preparation method thereof, display device and lighting equipment
  • Electroluminescent device and preparation method thereof, display device and lighting equipment
  • Electroluminescent device and preparation method thereof, display device and lighting equipment

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the application shall have the ordinary meanings understood by those skilled in the art to which th...

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Abstract

The invention discloses an electroluminescent device and a preparation method thereof, a display device and lighting equipment, which are used for improving the efficiency and the service life of an organic light-emitting diode device. The embodiment of the invention provides an electroluminescent device. The electroluminescent device comprises an anode, a hole transport layer, a luminescent layer and a cathode which are arranged in a laminated manner, the hole transport layer comprises at least two hole transport materials, the highest occupied molecular orbital energy levels of the different hole transport materials are different, and the highest occupied molecular orbital energy levels of the hole transport layer are gradually reduced in the direction from the anode to the light emitting layer.

Description

technical field [0001] The present application relates to the field of display technology, in particular to an electroluminescence device and a preparation method thereof, a display device, and a lighting device. Background technique [0002] Organic Light Emitting Diodes (OLEDs) are widely used in display technologies due to their advantages of thinness, high contrast, flexibility, and short response time. [0003] Energy levels such as the highest occupied molecular orbital (HOMO) are very important parameters in OLED devices. The energy level matching between functional layers greatly affects carrier injection and transport, which in turn affects the efficiency and lifetime of OLED devices. In the prior art, the HOMO energy level of the hole transport layer in the organic light emitting diode device is fixed, which affects carrier transport and affects the efficiency and life of the organic light emitting diode device. Contents of the invention [0004] Embodiments of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56H01L27/32
CPCH10K59/10H10K50/11H10K2101/40H10K50/156H10K71/00
Inventor 温向敏樊星高昊王艳明李旭
Owner BOE TECH GRP CO LTD
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