Display panel and preparation method therefor, and display device

A display device, comprising a display panel, wherein the display panel comprises a substrate, a pixel definition layer, a plurality of pixel structures, a transparent cathode patterning material (CPM) layer, and a plurality of cathode layers;

• wherein
• the pixel definition layer is provided with a plurality of pixel openings and is connected to the substrate;
• the plurality of pixel structures are disposed in different pixel openings and are connected to the substrate;
• the transparent CPM layer is disposed on a side, away from the substrate, of the pixel definition layer and is connected to the pixel definition layer, and the transparent CPM layer is provided with a plurality of cathode openings, wherein in a thickness direction of the substrate, an orthographic projection of each of the cathode openings covers an orthographic projection of one of the pixel openings;
• and
• each of the cathode layers is disposed on a side, away from the pixel definition layer, of one of the pixel structures and is connected to the pixel structure, and a position of each of the cathode layers corresponds to a position of one of the cathode openings.