Photochemical deposition of FeSxOy

FeSxOy thin films were deposited on indium–tin-coated glass substrates using the photochemical deposition technique from an aqueous solution containing FeSO4 and Na2S2O3. The experiments were performed at room temperature with and without Fe powder attached on the substrate. A very thin film with S-rich composition was obtained without Fe powder. With Fe powder adhered on the substrate, Fe- and O-rich black films with a thickness larger than 1 μm were obtained. From the photoelectrochemical measurement, the deposited FeSxOy film showed n-type conduction and photoconductivity.