PHOTOELECTRIC AMPLIFICATION OF VARIBAND PHOTORESISTORS

Characteristic features of the photoelectric amplification of variband photoresistors, whose energy gap increases linearly toward the contac ts, are theoretically investigated. It is shown that such photoresisto rs are characterized by a nonmonotonic held-dependence of the photoele ctric gain, whose maximum value increases with growth of the energy ga p gradient and can substantially exceed the corresponding value for ho mogeneous samples. (C) 1997 American Institute of Physics.