Abstract
Abstract Tungsten oxide (WO 3 ) thin films were deposited by using the spray pyrolysis technique. For the deposition, a 5 mM propanolic solution of ammonium tungstate was sprayed with a 6 ml min −1 spray rate onto the fluorine doped tin oxide coated conducting glass substrates. The substrate temperature was varied from 250 to 450°C, at an interval of 50°C. The influence of the substrate temperature on the structural and optical properties of the WO 3 films was studied. The electrochemical properties of WO 3 in 0.1 M H 2 SO 4 electrolyte were studied using cyclic-voltammetry and chronoamperometry and various parameters were estimated. The WO 3 sample deposited at 350°C having mixed triclinic and hexagonal structure exhibited highest colouration efficiency.
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