Display panel, fabrication method therefor, and display device

A method for manufacturing a display panel, comprising:

• providing a base substrate;
• forming a pattern of a pixel definition layer that defines subpixels of the display panel on the base substrate, and forming a groove structure disposed between adjacent subpixels of the subpixels in the pixel definition layer;
• forming a spacer in the groove structure;
• and
• forming a light emitting layer on the pixel definition layer and the spacer,
• wherein a thermal expansion coefficient of the spacer is greater than a thermal expansion coefficient of the light emitting layer,
• wherein the spacer and a side wall of the groove structure are spaced away from each other, a gap is between the spacer and the pixel definition layer, and a portion of the light emitting layer is disposed at a bottom of the gap between the spacer and the pixel definition layer which is closer to the base substrate.

A display device, comprising a display panel, wherein the display panel comprises:

• a base substrate;
• a pixel definition layer, configured to define subpixels in the display panel and including a groove structure which is disposed between adjacent subpixels;
• a spacer, disposed in the groove structure;
• and
• a light emitting layer, disposed on a side of the pixel definition layer and the spacer away from the base substrate,
• wherein a thermal expansion coefficient of the spacer is greater than a thermal expansion coefficient of the light emitting layer,
• wherein the spacer and a side wall of the groove structure are spaced away from each other, a gap is between the spacer and the pixel definition layer, and a portion of the light emitting layer is disposed at a bottom of the gap between the spacer and the pixel definition layer which is closer to the base substrate.