Abstract
Photocurrent characteristics of the Cu2O/Pt and Cu2O/TiO2 photoelectro-chemical cells have been presented. In aqueous solution, a slow deterioration of power output occurs approximately at the rate of 50% per day. Operation in non-aqueous solutions (acetonitrile and ethanol) also produced a deterioration of power output. However in ethanol, it was found that the deterioration reversed itself and a new cycle of deterioration and rejuvenation began. These suggest that the deterioration is not due to a chemical reduction process at the electrode surface but other factors such as migration of charged defect centres in the depletion layer or chemical reaction on the electrode surface.
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References
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Khan, K.A., Kos, J.F. Photocurrent characteristics in Cu2O/Pt and Cu2O/TiO2 photoelectrochemical cells in aqueous and non-aqueous electrolytes. Pramana - J. Phys. 26, 277–281 (1986). https://doi.org/10.1007/BF02845268
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DOI: https://doi.org/10.1007/BF02845268