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

A method of fabricating a display substrate, comprising forming a plurality of subpixels;

• wherein forming a respective one of the plurality of subpixels comprises:
• forming a light emitting element;
• forming a first thin film transistor configured to driving light emission of the light emitting element;
• and
• forming a light emitting brightness value detector;
• wherein forming the light emitting brightness value detector comprises:
• forming a second thin film transistor;
• and
• forming a photosensor electrically connected to the second thin film transistor and configured to detect a light emitting brightness value;
• wherein the method further comprises forming a silicon organic glass layer on a side of at least one of the first thin film transistor or the second thin film transistor away from a base substrate;
• and
• the photosensor is formed on a side of the silicon organic glass layer away from the base substrate.