Patent ID: 8053763

Claim:
An organic semiconductor light-emitting device comprising: an organic semiconductor active layer as a transistor active layer, having a source area and a drain area set at an interval of a predetermined channel length; a source electrode joined to the source area of the organic semiconductor active layer; an organic semiconductor light emitting part joined directly to the drain area of the organic semiconductor active layer; a drain electrode joined to the organic semiconductor light emitting part; and a gate electrode disposed on the organic semiconductor active layer, with an insulating film sandwiched between the gate electrode and the organic semiconductor active layer, and extending to a region opposite to the entire source and drain areas, the gate electrode including a first gate electrode and a second gate electrode respectively facing the source area and the drain area, the first and second gate electrodes being electrically independent, with a space formed therebetween facing the interval between the source and drain areas, the gate electrode facing at least a region of the organic semiconductor active layer between the source area and the drain area, for controlling transportation of carriers between the source area and the drain area, wherein the organic semiconductor light emitting part includes an organic semiconductor light-emitting layer which is supplied with one of electrons and holes from the drain electrode, and is supplied with the other of the electrons and the holes from the organic semiconductor active layer, thereby generating light due to recombination of the electrons and the holes.