Display substrate having spacer for spacing apart carrier injection layer portions of two adjacent sub-pixels, and manufacturing method thereof

A display substrate, having a first sub-pixel area and a second sub-pixel area which are adjacent,

• wherein the display substrate comprises:
• a base substrate, and
• a first conductive layer, an organic functional layer and a second conductive layer which are on the base substrate sequentially,
• wherein the organic functional layer comprises a carrier injection layer;
• the first conductive layer comprises a first electrode and a second electrode, and the first electrode and the second electrode are in the first sub-pixel area and the second sub-pixel area, respectively, and are insulated from each other;
• the carrier injection layer comprises a first carrier injection layer portion and a second carrier injection layer portion, and the first carrier injection layer portion and the second carrier injection layer portion are in the first sub-pixel area and the second sub-pixel area, respectively;
• the second conductive layer comprises a third electrode and a fourth electrode, the third electrode and the fourth electrode are in the first sub-pixel area and the second sub-pixel areas, respectively, and the third electrode and the fourth electrode are connected with each other and are in an integrated structure;
• the first electrode, the first carrier injection layer portion and the third electrode form a first light-emitting element, and the second electrode, the second carrier injection layer portion and the fourth electrode form a second light-emitting element;
• the display substrate further comprises a spacer which is between the first and second light-emitting elements and separates the first carrier injection layer and the second carrier injection layer portion;
• the carrier injection layer further comprises a third carrier injection layer portion, and the third carrier injection layer portion is between the spacer and the second conductive layer, and is separated from the first carrier injection layer portion and the second carrier injection layer portion, respectively;
• the display substrate further comprises a drive circuit which is electrically connected with the first light-emitting element and the second light-emitting element, and the drive circuit is configured to drive the first light-emitting element and the second light-emitting element;
• the drive circuit comprises a transistor comprising a semiconductor layer which is inside the base substrate;
• and
• a ratio of a thickness of the second conductive layer to a thickness of the spacer ranges from 0.5 to 2 in a direction perpendicular to the base substrate.