Display substrate with power pad in peripheral area and method of manufacturing thereof

A display substrate having a display area and a peripheral area, comprising:

• a base substrate;
• a first power pad on the base substrate, the first power pad comprising a first portion in the peripheral area and along a power line interface side of the display substrate;
• a planarization layer on a side of the first power pad away from the base substrate;
• a pixel definition layer on a side of the planarization layer away from the base substrate, defining a plurality of subpixel apertures;
• and
• an encapsulating layer on a side of the pixel definition layer away from the base substrate;
• wherein the display substrate comprises a first groove extending through one or a combination of the planarization layer and the pixel definition layer, exposing a surface of the first portion of the first power pad in the peripheral area;
• and
• a sub-layer of the encapsulating layer extends from the display area into the first groove and is in direct contact with the surface of the first portion, thereby encapsulating the display substrate.