Display substrate and display device

The invention discloses a display substrate and a display device. The display device includes a substrate, and a plurality of light emitting elements and a pixel defining pattern on the substrate. The light-emitting element comprises a light-emitting functional layer, a first electrode and a second electrode; the pixel defining pattern includes a plurality of openings and a defining portion surrounding the plurality of openings, and the light emitting elements are at least partially located in the openings. The light-emitting element further comprises a light conversion layer, the light conversion layer is configured to enable one kind of color light to enter the light conversion layer and then emit the other kind of color light, the light conversion layer is located on the side, away from the substrate, of the second electrode, and at least part of the light conversion layer is located in the opening. The surface, close to the substrate, of the part, located in the opening, of the light conversion layer is closer to the substrate than the surface, away from the substrate, of at least the part, away from the substrate, of the limiting part. According to the display substrate provided by the embodiment of the invention, the distance between the light conversion layer and the light-emitting functional layer can be reduced as much as possible, so that the conversion efficiency of the light conversion layer on incident light is improved.