Display substrate and display device

A display substrate, comprising:

• a base substrate, comprising an active area and a peripheral area located on a periphery of the active area;
• an encapsulation structure layer, arranged on the base substrate, located in the active area and the peripheral area, and comprising an organic encapsulation layer;
• a barrier dam and at least one barrier post, located in the peripheral area, wherein the at least one barrier post is located on a side of the barrier dam close to the active area;
• and
• the organic encapsulation layer has a gradient area in the peripheral area, and an orthographic projection of the gradient area of the organic encapsulation layer on the base substrate is overlapped with an orthographic projection of the at least one barrier post on the base substrate,
• wherein the display substrate further comprises a light emitting structure layer located on the base substrate, wherein the light emitting structure layer is located on a side of the encapsulation structure layer close to the base substrate and comprises a cathode layer,
• wherein the display substrate further comprises a pixel planarization layer, wherein the pixel planarization layer is located on a side of the light emitting structure layer close to the base substrate, and an orthographic projection of the at least one barrier post on the base substrate is partially overlapped with an orthographic projection of the pixel planarization layer on the base substrate.