Display substrate and preparation method thereof, and display device

Abstract

The present invention provides a display substrate and a preparation method thereof, and a display device. The preparation method comprises: providing a substrate; forming a pixel definition layer on the substrate; performing oxidation treatment of the pixel definition layer, wherein one side, far away from the substrate, of the pixel definition layer is partially oxidized so as to allow the pixel definition layer to comprise a main body layer close to the substrate and an oxidation layer far away from the substrate; and performing solidification and molding processing of the pixel definition layer, and performing composition technology of the pixel definition layer to form a pixel definition pattern. The pixel definition pattern is formed through one-time film forming technology and the composition technology to simplify the preparation technology and reduce the preparation cost, and the internal portion of the formed pixel definition has no the interface problem so as to improve the stability of the pixel definition pattern structure.

Description

technical field [0001] Embodiments of the present disclosure relate to a display substrate, a manufacturing method, and a display device. Background technique [0002] In the process of preparing a display substrate (such as an AMOLED display substrate) using inkjet printing, the pixel defining layer is used to define the shape of pixels and store ink. In order to prevent ink mixing between adjacent pixels, the surface of the pixel-defining layer must have strong liquid repellency properties, and at the same time, it is necessary to make the falling ink droplets that are slightly offset (such as ink droplets that land on the inner edge of the pixel) roll to the surface of the pixel. In the pixel pit, the pixel boundary layer needs to be set as a structure in which the lower layer is lyophilic and the upper layer is lyophobic. [0003] The traditional preparation of the pixel definition layer requires two steps, which are cumbersome and require investment in different equipm...

AI Technical Summary

Problems solved by technology

As another example, a method of forming a pixel-defining layer of a two-layer structure on a substrate makes the first layer (lower layer) have a high surface energy (lyophilic material) and the second layer (upper layer) has a low surface energy by using plasma treatment. Surface energy (lyophobic material), although this method can also meet the needs of accurate inkjet printing and film uniformity, as the above method, the resulting two-layer structure of the pixel definition layer (lyophilic part and lyophobic part ) There is an interface problem between them, and they are prone to delamination

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