THIN FILM CADMIUM SELENIDE ELECTRODEPOSITED FROM SELENOSULPHITE SOLUTION

摘要

ABSTRACT OF THE DISCLOSUREA process for electrodepositing a thin layer ofcadmium selenide on a suitable substrate is disclosed.The substrate is immersed in an electrolyte bath with pHranging from 5 to 10 and having an aqueous solution ofselenosulphite ions and cadmium ions complexed withnitrilotriacetic acid. The pH range shifts the chemicalequilibrium of complexing the cadmium ions towardsassociated complexed cadmium ions. A voltage is appliedto the cathode and anode in the electrolyte to reducethe selenosulphite ions to produce selenide ions at thecathode of a sufficient concentration which reacts withthe complexed cadmium ions to electrodeposit therebycadmium selenide on the cathode. The thin layer ofcadmium selenide is particularly useful in in aphotoelectrochemical cell.