A kind of oled display panel and preparation method thereof

A display panel and substrate technology, applied in the field of OLED display, can solve the problems of low efficiency, inability to form a microcavity effect, luminous efficiency and contrast that cannot reach an ideal state, etc.

Active Publication Date: 2018-12-21
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the fact that the anode and cathode in ordinary transparent OLEDs are both transparent materials, it is impossible to form a microcavity effect, and the efficiency of transparent OLED devices is lower than that of top-emitting and bottom-emitting devices, so the luminous efficiency and contrast of OLEDs are not ideal.

Method used

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  • A kind of oled display panel and preparation method thereof
  • A kind of oled display panel and preparation method thereof
  • A kind of oled display panel and preparation method thereof

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Experimental program
Comparison scheme
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Embodiment 1

[0043] In order to solve the defect in the prior art that the anode and the cathode in the ordinary OLED are transparent materials, so that the microcavity effect cannot be formed, the luminous efficiency and contrast of the OLED cannot reach the ideal state, the embodiment of the present invention provides a new type OLED display panel structure, the structure achieves the ideal effect by adding an electrochromic layer (Electrochromic Layer) with hole injection and / or hole transport function in the traditional OLED display panel.

[0044] Among them, such as figure 2 As shown, the structure of the color-changing device using the electrochromic layer generally has a 5-layer structure, including a substrate 21 , a first transparent electrode 22 , an electrochromic layer 23 , an electrolyte 24 , an ion storage layer 25 and a second transparent electrode 26 . The role of the ion storage layer 25 is to provide or store ions required for discoloration, and the role of the electrol...

Embodiment 2

[0059] Based on the above OLED display panel structure, the embodiment of the present invention also provides a method for manufacturing an OLED display panel. The technical solution described in Embodiment 1 is also applicable to this embodiment, and the same as described in this embodiment The technical solution is also applicable in the first embodiment, so some technical solutions will not be described in detail in this embodiment.

[0060] Specifically, such as Figure 7 Shown:

[0061] Step S1, providing a TFT substrate, and forming an anode layer on the TFT substrate;

[0062] Step S2, forming an organic layer on the anode layer;

[0063] Step S3, forming a cathode layer on the organic layer;

[0064] Wherein, an electrochromic layer is formed in the organic layer.

[0065] In the embodiment of the present invention, in the process of preparing the organic layer (including the OLED device layer and the electrochromic layer), the specific steps are: sequentially prep...

Embodiment 3

[0069] Based on the above-mentioned OLED display panel structure, an OLED display panel with a specific material is provided in this embodiment, such as Figure 5 shown.

[0070] The OLED display panel in this embodiment is as an electrochromic device, and its basic structure comprises: substrate (Glass) 51 / transparent anode (ITO) 52 / hole injection layer, electrochromic layer (PEDOT:PEO:LiCF 3 SO 3 )53 / hole transport layer (NPB)54 / light-emitting layer (Bebq 2 :Ir(MDQ) 2 (acac))55 / electron transport layer (Alq 3 )56 / translucent cathode (Mg:Ag=1:9)57 / refractive index matching layer (NPB)58.

[0071] PEDOT, a derivative of polythiophene, is an important hole injection material, which can modify the surface of ITO to facilitate the injection of holes; it is also an electrochromic material, and the complex of polyethylene oxide (PEO) and lithium salt LiCF 3 SO 3 It is the most representative polymer solid electrolyte. The two spin-coated on the ITO anode can be used as the i...

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Abstract

The invention relates to the technical field of OLED (organic light-emitting diode) display, in particular to an OLED display panel and a preparation method thereof. An electrochromism layer with hole injection and / or hole transmission functions is added to a conventional OLED display panel, and the transparency of the OLED display panel can be adjusted by means of characteristics of different transmittance or reflectivity of the electrochromism layer under the power-on and power-off conditions, so that the contrast ratio of the transparent OLED display panel is increased; besides, due to change of reflectivity of the electrochromism layer under the power-on condition, the electrochromism layer can form a microcavity effect with a cathode, and the luminous efficiency of the transparent OLED display panel is further improved.

Description

technical field [0001] The invention relates to the field of OLED display technology, in particular to an OLED display panel and a preparation method thereof. Background technique [0002] OLED is an Organic Light-Emitting Diode (Organic Light-Emitting Diode). Because of its lightness, lightness, power saving and other characteristics, this display device has been widely used in digital products. Compared with the traditional LCD (Liquid Crystal Display, liquid crystal display), OLED display technology does not require a backlight, and uses very thin organic material coatings and glass substrates. When current passes through, these organic materials will emit light. As a display device, the OLED display will also be affected by environmental factors, especially in a strong light environment, the display effect of the OLED display will also decline. [0003] Such as figure 1 As shown, the common transparent OLED structure mainly includes a TFT (Thin filmtransistor, thin fil...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01L27/32H01L51/56
Inventor牟鑫
OwnerEVERDISPLAY OPTRONICS (SHANGHAI) CO LTD