Display substrate, display apparatus, and method of fabricating display substrate

A method of fabricating a display substrate having a display area and a peripheral area, comprising:

• forming an insulating layer on a base substrate and in at least the peripheral area;
• forming a groove extending into the insulating layer in the peripheral area, and substantially surrounding the display area;
• forming a plurality of light emitting elements on the base substrate and in the display area;
• forming an encapsulating layer on a side of the plurality of light emitting elements distal to the base substrate to encapsulate the plurality of light emitting elements;
• and
• forming a dam layer on a side of the insulating layer distal to the base substrate;
• wherein forming the encapsulating layer comprises forming a first inorganic encapsulating sublayer extending from the display area into the peripheral area;
• the first inorganic encapsulating sublayer is formed so that the first inorganic encapsulating sublayer extends into at least a portion of the groove;
• the dam layer comprises a first dam sublayer on a side of the insulating layer distal to the base substrate;
• a second dam sublayer on a side of the first dam sublayer distal to the insulating layer;
• a third dam sublayer on a side of the second dam sublayer distal to the first dam sublayer;
• an orthographic projection of the dam layer on the base substrate spaces apart an orthographic projection of a portion of the first inorganic encapsulating sublayer inside the groove on the base substrate from an orthographic projection of light emitting elements in the display area on the base substrate;
• the insulating layer comprises a first portion and a second portion;
• an orthographic projection of the first portion on the base substrate covers the orthographic projection of the dam layer on the base substrate;
• an orthographic projection of the second portion on the base substrate is non-overlapping with the orthographic projection of the dam layer on the base substrate;
• and
• the orthographic projection of the portion of the first inorganic encapsulating sublayer inside the groove on the base substrate spaces apart the orthographic projection of the first portion on the base substrate from an orthographic projection of the second portion on the base substrate.