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OLED device and making method thereof, and display device

A technology for a device and a light-emitting layer, applied in the field of OLED devices and its preparation method, and display devices, can solve problems such as image color shift, achieve the effects of improving luminous brightness, preventing color shift, and reducing white point shift

Active Publication Date: 2017-10-20
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the lifespan attenuation of the organic material of the light-emitting layer in the existing OLED device is inconsistent, which causes the color shift of the image displayed on the display, and provides an OLED device, a preparation method thereof, and a display device

Method used

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  • OLED device and making method thereof, and display device
  • OLED device and making method thereof, and display device
  • OLED device and making method thereof, and display device

Examples

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Embodiment 1

[0037] This embodiment provides an OLED device, including a plurality of pixels, each pixel includes a plurality of sub-pixels of different colors, each sub-pixel includes a cathode 1, an anode 2, and a A luminous efficiency adjustment unit 4 is provided between the cathode 1 of at least some of the sub-pixels and the luminous layer 3, and the vibration characteristic peak (LSPR peak) of the luminous efficiency adjustment unit 4 can be adjusted to match the luminescent material of the corresponding luminescent layer. The wavelengths of the sub-pixels overlap so that the luminous brightness of multiple sub-pixels is consistent with the degree of attenuation over time.

[0038] In the OLED device of this embodiment, a luminous efficiency adjustment unit 4 is respectively arranged between the cathode 1 and the light-emitting layers of various colors, and a plurality of luminous efficiency adjustment units 4 are respectively adjusted so that the vibration characteristic peak of eac...

Embodiment 2

[0041] This embodiment provides an OLED device, such as figure 2 , image 3 As shown, it includes a cathode 1, an anode 2, and a light-emitting layer 3 interposed between the cathode 1 and the anode 2. The light-emitting layer 3 includes a first color light-emitting layer, a second color light-emitting layer, a second color light-emitting layer, and a light-emitting layer. A sub-pixel composed of three-color light-emitting layers, a luminous efficiency adjustment unit 4 is respectively provided between the cathode 1 and the first-color light-emitting layer and the second-color light-emitting layer, so that the first-color light-emitting layer and the second-color light-emitting layer emit light The luminous brightness of the layer and the third color luminescent layer are consistent with time decay.

[0042] That is to say, the light-emitting layer 3 includes light-emitting layers of three different colors, wherein the attenuation speed of the light-emitting brightness of th...

Embodiment 3

[0062] The present embodiment provides a kind of preparation method of above-mentioned OLED device, such as Figure 5 As shown, the following preparation steps are included:

[0063] S01. Forming a luminous efficiency adjustment unit on the cathode; which specifically includes the following preparation steps: S01a. Treating the cathode to make its surface negatively charged, and then immersing it in a charged polymer electrolyte to make its surface positively charged. Specifically, the clean ITO conductive glass is first treated with oxygen plasma to make its surface negatively charged, and then soaked in polydiallyl dimethyl ammonium chloride (PDDA) charged polymer electrolyte, polymerized The material electrolyte achieves electrostatic adsorption through the layer-by-layer self-assembly method, so that its surface is positively charged. S01b, electrostatic adsorption of silver nanorod particles on the surface of the above-mentioned cathode (i.e. ITO conductive glass), speci...

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Abstract

The invention provides an OLED device and a preparation method thereof and a display device, and belongs to a field of display technology. The invention can solve a problem of image color cast of a display caused by inconsistence of life attenuation of organic materials of different colors in a light emitting layer in a prior OLED device. According to the invention, light emitting efficiency adjusting units are arranged between an anode electrode and light emitting layers of different colors respectively. At least a part of the light emitting efficiency adjusting units are adjusted so as to enable the vibration characteristic peak of each light emitting efficiency adjusting unit to coincide with wavelength of light emitting material of the light emitting unit of the corresponding color. In this way, the luminance of the light emitting layers of different colors can be kept consistent along with time attenuation; the luminance of the light emitting layers is improved; white spot offset caused by variation of the light emitting layers of different colors is reduced; and attenuation curves of the light emitting layers of different colors are adjusted to be generally identical and color cast is prevented effectively.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an OLED device, a preparation method thereof, and a display device. Background technique [0002] With the development of full-color technology for Organic Light Emitting Diode (OLED) devices, the more common full-color technologies currently include Fine-Metal-MASK (FMM), color filter, etc. Chip method (also known as "white light + color filter film" method White+Color filter, W+CF), and blue conversion method (Blue+colorconversion method, Blue+CCM), etc. [0003] The inventors have found that there is a serious problem in the OLED display products in the prior art: due to the inconsistent lifetime attenuation of the organic materials in the light-emitting layer of the OLED device, the luminous brightness of the OLED display products gradually decays with the increase of the driving time, resulting in the image displayed on the display Color cast occurs, see figur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56H01L27/32H10K99/00
CPCH10K2102/3026H10K71/00H10K59/875H10K59/35H10K50/171H10K2102/331H10K50/85H10K50/135H10K71/12H10K71/60H10K85/111H10K2102/101
Inventor 张吉亮何鑫
Owner BOE TECH GRP CO LTD
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