An electroluminescent organic transistor is described. The electroluminescent organic transistor has a semiconductor heterostructure constituted by a plurality of layers of semiconductor materials of p-type and n-type, which act, respectively, for the conduction of holes and electrons within the heterostructure, and at least two layers of emitting materials each of which is interposed between, and in direct contact with, one of the layers of p-type semiconductor material and another one of the layers of n-type semiconductor material.