PHOTOELECTROCHEMICAL BEHAVIOUR OF SOME OXIDES UNDER HIGH INTENSITY ILLUMINATION.

The authors measured the PEC parameters of CoNb//2O//6 (Niobite), WCr//2O//6 (trirutile) and LaNi//0//. //2//5 W//0//. //7//5O//3 (Perovskite) under high intensity illumination. The authors also noticed that these oxides did not display significant photovoltages or currents at low light intensities. The electrodes were prepared in the form of sintered compacts. CoNb//2O//6 was reduced under hydrogen at 700 degree C for 1h. to induce n-type conductivity. WCr//2O//6 and LaNi//0//. //2//5W//O//0//. //7//5O//3 were n minus and p minus type respectively. Open circuit potentials (V//o//c) and potentiostatic current-voltage (i-v) characteristics were examined.