PHOTOELECTROCHEMICAL INVESTIGATIONS ON PARTICULATE FILMS OF CDS GROWN BY NOVEL ELECTROCHEMICAL METHOD

An account of photoelectrochemical investigations on particulate films of CdS prepared by a novel electrochemical method (described earlier) is presented. An alkaline solution of diethanolamine has been used as an electrolyte for the first time in such particulate film based photoelectrochemical systems. Current - potential measurements, by displaying prominently high values of the photocurrent, indicate an anomaly associated with ''nanocrystalline'' composition of the particulate films. The action spectra of these particulate films reveal an appreciable blue shift in the fundamental absorption edge of CdS. It can be attributed to a tendency towards size quantization after eliminating other possibilities such as existence of cubic phase, occurrence of Burstein - Moss effect and strong absorption of blue photons which also can lead to similar blue shift.