PHOTORESPONSIVE DEVICE HAVING IMPROVED BACK REFLECTOR

摘要

A photoresponsive device incorporating a back reflector (28) disposed between a substrate (11) and a photoactive semiconductor body (26) and formed of an alloy to promote adhesion of the substrate and semiconductor body to the reflector and to prevent diffusion between the reflector and the semiconductor body. The reflector may be deposited by sputtering to avoid agglomeration. The reflector may preferably be an alloy of aluminum or silver containing five to ten percent silicon. The substrate may be electrically conducting or may be a thin conductive layer deposited on an electrically insulating film.