Photoelectrochemical Investigation on Trigonal Selenium Film Electrodes

The photoelectrochemical properties of trigonal selenium films were investigated in view of a possible application in semiconductor liquid junction photo cells. A photo decomposition reaction of Se into hydrogen selenide was observed in acidic solutions. Only redox couples with a relatively anodic standard potential can prevent the decomposition process. The results are interpreted by a charge transfer process via interband states. Possible applications of Se‐film electrodes are discussed.