Electrodeposition of SnO2 Thin Films from Aqueous Tin Sulfate Solutions

Tin oxide (SnO 2 ) thin films were successfully electrodeposited on indium tin oxide (ITO) coated glass substrate from an acidic aqueous solution containing SnSO 4 at room temperature. Oxygen bubbling was employed so that dissolved oxygen serves as oxygen precursor. With O 2 bubbling and short deposition time, transparent films were obtained. The composition ratios of the films were measured by Auger electron spectroscopy. The n-type conductivity and the photosensitivity of the films were confirmed from photoelectrochemical measurement.