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Photoelectrochemical Properties of Thin Low Cost Polycrystalline CdS Photoanodes

In the present paper photoelectrochemical processes and physical properties of the photovoltaic CdS/KCl-K3Fe(CN)6-K4Fe(CN)6/Pt electrolytic cellhave been studed. CdS polycrystalline photoanodes were prepared by pyrolytic spraying. The electrode resistance was measured and the film structure and composition were analyzad by SEM.Optical measurements were performed in order to determine the absorbance and the energy gap of the sprayed CdS films. Current-voltage characteristics as a function of the redox couple concentracion and the light intensity were measured under incandescent illumination and the sun light. Fill factors varied in the range from 0, 2 to 0, 4 and the efficiency of th yet non-optimized cells reaches 0, 4 %. The problem of stability of the photoanode and its passivation were also discussed.

photoelectrochemical; polycrystalline; photoanodes

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