Photon induced modulation of surface barrier: investigation and application for a new image sensor

In this work the effect of photoexcitation on the parameters of surface potential barrier is investigated. We have examined in detail the phenomenon, which is determined by trapping of nonequilibrium carriers into the deep levels. It is shown how the parameters of surface barrier are governed by visible or X-ray excitation. The described effect together with the usage of an asymmetric heterojunction permits the fabrication of an image sensor of a quite new type.