A light-emitting transistor, disposed on a base substrate and comprising a gate layer, a first insulating layer, a source layer, a barrier layer, a light-emitting functional layer, and a drain layer arranged in sequence along a direction away from the base substrate, wherein
- the source layer includes a first wire grid structure, the first wire grid structure includes a plurality of first conductive strips arranged at intervals, and the plurality of first conductive strips are parallel to each other;
- and
- the barrier layer covers surfaces of the plurality of first conductive strips, and a surface of the barrier layer away from the base substrate is parallel to the base substrate.