Abstract
AbstractTriclinic CuWO4 and Zn doped CuWO4 nanocomposites have been synthesized by the solid state reaction method to evaluate the Photoelectrochemical (PEC) performance of the photoelectrodes. The existence of WO3 along with CuWO4 is affirmed by the XRD, XPS spectra and HRTEM images. PEC measurements showed that the generated photocurrent is found to be maximum of about 8.94 mA/cm2 for Zn doped CuWO4whereas it is 2.63 mA/cm2 for bare CuWO4 electrode measured at 0.1 M of Na2SO4 acts as a suitable electrolyte under the illumination. The carrier density (Nd) of the nanocomposites is determined by Mott‐Schottky plot that has n‐type conductivity for both the samples. The negative flat band potential of −0.52 V for Zn doped CuWO4 might be attributed to decrease in depletion width. Zn doped CuWO4 shows higher power conversion efficiency of about 3.95%. The solution resistance and charge transfer resistance of both the photoelectrodes were calculated using Nyquist plot and it is lower for Zn‐CuWO4 which indicates better conductivity and electron transfer rate.
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