Patent ID: 9030189
Filing Date: 2015-05-12
Classification: G01R,H01L

Abstract:
1. A photo-field effect transistor device comprising: an electrically insulating substrate; source and drain electrodes provided on said substrate in a spaced relationship; a carrier-accepting semiconductor channel contacting said substrate between said source and drain electrodes, wherein said carrier-accepting semiconductor channel is in electrical communication with said source and drain electrodes; and a light absorbing quantum dot sensitizing layer contacting said carrier-accepting semiconductor channel, said quantum dot sensitizing layer producing photo-generated carriers under illumination of light within a selected optical bandwidth; wherein an interface between said quantum dot sensitizing layer and said carrier-accepting semiconductor channel forms a type II heterojunction configured to inject one type of said photo-generated carriers into said carrier-accepting semiconductor channel, thereby producing primary photocarriers within said carrier-accepting semiconductor channel; and wherein said carrier-accepting semiconductor channel is characterized by a mobility such that under application of a voltage difference between said source and drain electrodes and under illumination of said quantum dot sensitizing layer, a photocurrent is produced due to injection of the primary photocarriers and recirculation of secondary photocarriers.