Patent ID: 8247801

Claim:
An organic photo-detecting field-effect device comprising: a first layer comprising a first organic semi-conducting material, the first organic semi-conducting material having a high charge carrier mobility for a first type of charge carriers; a source electrode in electrical contact with the first layer; a drain electrode in electrical contact with the first layer, whereby the source electrode and the drain electrode delineate a channel region entirely therebetween in the first layer; a second layer comprising a second material, the second material being conducting or semi-conducting, the second layer being in electrical and physical contact with the first layer at least in the channel region, and the second layer not being in electrical contact with the source electrode; a gate insulator in contact with at least one of the first layer and the second layer; a gate electrode in contact with the gate insulator and electrically isolated from the source electrode, the drain electrode, the first layer and the second layer; and means for removing a second type of charge carriers oppositely charged from the first type of charge carriers from the second layer.