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Light emitting device and display panel

A technology for light-emitting devices and light-emitting layers, which is applied in electric solid-state devices, semiconductor devices, organic semiconductor devices, etc., can solve problems such as the expansion or reduction of the opening area ratio, and achieve the improvement of luminous efficiency, prolong life, and improve injection efficiency and migration efficiency. Effect

Active Publication Date: 2020-09-22
YUNGU GUAN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from a process point of view, the ratio of the opening area of ​​blue light-emitting devices, green light-emitting devices and red light-emitting devices cannot be expanded or reduced without limit

Method used

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  • Light emitting device and display panel
  • Light emitting device and display panel
  • Light emitting device and display panel

Examples

Experimental program
Comparison scheme
Effect test

experiment example 2

[0062] The activation energy design of each layer in Experimental Example 2 is as follows: the absolute value of the average activation energy difference between the blue light-emitting host material BH and the blue light-emitting doped material BD is 0.1 eV, and the blue light-emitting doped material BD is The absolute value of the average activation energy difference between the level matching layers 101a is 0.04eV; the absolute value of the average activation energy difference between the blue light-emitting host material BH and the level matching layer 101a is 0.11eV, the level matching layer The absolute value of the average activation energy difference between 101a and the electron transport layer 103a is 0.02 eV. Specifically, in this experimental example 2, the difference between the activation energy of the blue light-emitting host material BH and the blue light-emitting doped material BD relative to the electron transport layer 103a is positive; and the activation ener...

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Abstract

The invention discloses a light emitting device and a display panel. The light emitting device includes a hole transport layer, an energy level allocation layer and a light emitting layer are arrangedin a stacked mode, wherein a first difference value exists between the average activation energy of the hole transport layer and the average activation energy of the energy level allocation layer, asecond difference value exists between the average activation energy of the energy level allocation layer and the average activation energy of a host material of the light emitting layer, and the absolute value of the first difference value and the absolute value of the second difference value are greater than 0eV. In this way, the service life of the light emitting device can be prolonged in an activation energy matching mode.

Description

Technical field [0001] This application belongs to the field of display technology, and specifically relates to a light emitting device and a display panel. Background technique [0002] The blue light-emitting device, the green light-emitting device, and the red light-emitting device in the OLED display panel have different lifespans, and there is a problem of white light color change when lit for a long time. For example, generally speaking, the life span of blue light-emitting devices is relatively short, so the OLED display panel may become reddish or greenish or yellowish after long-term use. [0003] In order to solve this problem, currently commonly used methods include: adjusting the opening area of ​​the blue light emitting device, the green light emitting device, and the red light emitting device to reduce the difference in the life level of the three. However, from the perspective of process, the ratio of the opening area of ​​the blue light emitting device, the green l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50
CPCH10K50/11H10K2101/40H10K50/15H10K50/181H10K50/156H10K50/18H10K2101/30
Inventor 刘孟宇高宇黄智
Owner YUNGU GUAN TECH CO LTD