Display panel, preparation method thereof and display device

The embodiment of the invention provides a display panel, a preparation method thereof and a display device, relates to the technical field of display, and can avoid electric leakage of the display panel. The display panel provided by the invention comprises: a substrate; a first carrier layer arranged on the substrate; a pixel defining layer arranged on the first carrier layer, wherein the pixeldefining layer is provided with a pixel pit, and at least part of the first carrier layer is exposed out of the pixel pit. The first carrier layer is formed in front of the pixel defining layer, so that electric leakage caused by the fact that the first carrier layer climbs to a top platform of the pixel defining layer in the prior art can be effectively avoided. 本发明的实施例提供一种显示面板及其制备方法、显示装置，涉及显示技术领域，可避免显示面板漏电。本申请的显示面板包括基板；第一载流子层，设置在所述基板上；像素界定层，设置在所述第一载流子层上；其中，所述像素界定层设置有像素坑，所述像素坑露出至少部分所述第一载流子层。通过在像素界定层之前形成第一载流子层，可有效避免现有技术中第一载流子层爬坡至像素界定层顶部平台上形成漏电。