Display panel, preparation method thereof and display device

Abstract

The application provides a display panel and a preparation method thereof and a display device. The display panel comprises a substrate, a pixel definition layer located on one side of the substrate and provided with a plurality of pixel openings, a light emitting device layer comprising a plurality of light emitting units, at least part of the light emitting units being arranged in the pixel openings, and a color conversion layer located on a side of the light emitting device layer away from the substrate, the color conversion layer comprising a plurality of color conversion units corresponding to part of the pixel openings, each color conversion unit comprising a first part and a second part connected to each other, the second part being arranged around the first part, a normal projection of the first part on the substrate at least partially overlapping a normal projection of the corresponding pixel opening on the substrate, and a normal projection of at least part of the second part on the substrate being located outside the normal projection of the corresponding pixel opening on the substrate, wherein the thickness of the second part is smaller than the thickness of the first part in a direction perpendicular to the substrate. The technical solution of the application can improve the display effect.

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