Light emitting panel manufacturing method, light emitting panel and display device

Abstract

The invention discloses a light emitting panel manufacturing method, a light emitting panel and a display device. The method comprises steps that a substrate is provided, and an anode and a first cathode are disposed in the substrate; spaced-apart pixel defining layers are formed on the substrate to form a pixel region with respect to the anode and a contact hole region with respect to the first cathode; a first organic film layer is disposed in the pixel region, and a second organic film layer is disposed in the contact hole region; a photothermal conversion layer is disposed on the second organic film layer; a light emitting device layer is formed on the substrate; a transparent cold plate is placed on the substrate, the transparent cold plate is subjected to laser irradiation, the photothermal conversion layer under laser irradiation makes a sub light emitting device layer on the photothermal conversion layer sublimate, the sub light emitting device layer is cured on the transparentcold plate corresponding to the contact hole region, and the sub light emitting device layer is a portion of the light emitting device layer on the photothermal conversion layer; the transparent coldplate cured with the sub light emitting device layer is removed, and a second cathode is formed on the substrate.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a method for preparing a light-emitting panel, a light-emitting panel and a display device. Background technique [0002] In recent years, organic light emitting devices (Organic Light Emitting Diode, OLED) have become the most promising new display devices in recent years due to their advantages such as self-luminescence, all-solid-state, and high contrast. In the direction of large-size OLED screens, the existing products on the market are concentrated in the bottom emission structure, and the cathode uses thicker alkali metal. However, as users have higher and higher requirements for resolution, the OLED with the bottom structure will be limited by the aperture ratio, making it difficult to achieve higher resolution. Therefore, more and more manufacturers are turning their energy to the development of top OLEDs, hoping to achieve higher resolution. [0003] Howeve...

AI Technical Summary

Problems solved by technology

However, in the current contact hole structure, since there is an electron transport layer (Electron Transport Layer, ETL) with poor conductivity between the auxiliary cathode and the surface cathode, it is often necessary to use a high voltage to burn it in. This operation process is cumbersome and the effect is not obvious

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