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Organic electroluminescent devices and display panels

An electroluminescent device, organic technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of poor anti-ultraviolet ability of cathode structure, inconsistent display effect, large driving voltage gap, etc., and achieve good electrical conductivity. , to meet the flexible display, improve the effect of voltage drop

Active Publication Date: 2022-04-12
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the products that use OLED components are mainly small-sized mobile phones. If they are used in larger screens, the sheet resistance will increase, causing the driving voltage to increase greatly, which will easily cause a gap in the driving voltage of the OLED components at the edge of the screen and in the center of the screen. Large, there will be a problem of voltage drop, the display effect will be inconsistent, and the display quality will be affected
[0004] At present, although there are some improvement schemes for the cathode structure that can reduce the square resistance and improve the consistency of the driving voltage, the cathode structure or the ability to isolate water and oxygen, the ability to resist ultraviolet rays, etc., or poor flexibility, or poor heat dissipation performance, It is difficult to deal with the damage of the external environment to the luminescent material, and it also has a negative impact on other performances of the device.
Therefore, there is a lack of an organic electroluminescent device that can reduce sheet resistance and ensure other properties

Method used

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  • Organic electroluminescent devices and display panels
  • Organic electroluminescent devices and display panels
  • Organic electroluminescent devices and display panels

Examples

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Embodiment Construction

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0029] An organic electroluminescent device is provided in the embodiment of the present application, such as figure 1 As shown, it is a schematic diagram of the layered structure of an organic electroluminescent device, including an anode 2, a light-emitting layer 3 and a cathode 4 that are sequentially stacked on a substrate 1, wherein the cathode 4 includes a first cathode layer 41 and a second cathode layer that are stack...

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Abstract

The present application provides an organic electroluminescent device and a display panel. The organic electroluminescent device includes an anode, a light-emitting layer and a cathode sequentially stacked on a substrate, wherein the cathode includes a stacked first cathode layer and a second cathode layer. , the material of the second cathode layer includes graphene or modified graphene. Graphene or modified graphene has good electrical conductivity, which can reduce the sheet resistance, improve the problem of voltage drop, and narrow the display gap between the center and edge of the display panel; at the same time, it has bending resistance, heat dissipation performance, hydrophobicity, UV resistance, etc. performance and a longer service life.

Description

technical field [0001] The present application relates to the field of display technology, in particular, to an organic electroluminescent device and a display panel. Background technique [0002] Organic Light Emitting Diode (OLED) display devices have become the most promising new display devices in recent years due to their advantages of self-illumination, flexibility, and high contrast. [0003] At present, the products that use OLED components are mainly small-sized mobile phones. If they are used in larger screens, the sheet resistance will increase, causing the driving voltage to increase greatly, which will easily cause a gap in the driving voltage of the OLED components at the edge of the screen and in the center of the screen. Large, there will be a problem of voltage drop, the display effect will be inconsistent, and the display quality will be affected. [0004] At present, although there are some improvement schemes for the cathode structure that can reduce the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L27/32
CPCH10K59/12H10K50/822H10K50/828
Inventor 任艳萍张兵贺雪英
Owner BOE TECH GRP CO LTD
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