Fabrication of n-Cu2O electrodes with higher energy conversion efficiency in a photoelectrochemical cell |
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Authors: | C. Jayewardena K. P. Hewaparakrama D. L. A. Wijewardena H. Guruge |
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Affiliation: | Department of Physics, University of Ruhuna, Matara, Sri Lanka |
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Abstract: | We observed an n-type photoresponse in cuprous oxide films, which were prepared by a simple method of immersing copper plates in a HCl solution of 3 pH at 40°C temperature, when they were used in a PEC cell. This photoresponse was much higher than the previously published values for n-Cu2O electrodes which were prepared by other methods. The photocurrent obtained was in the order of 0.3 mA/cm2 when the cell was illuminated with light intensity of 50 mW/cm2. (The semiconductor electrode was biased to get a zero dark current.) The power conversion efficiency of the cell was 0.01%. The maximum quantum efficiency obtained was 15%. It is hoped that these values could be improved with a better understanding of the photoelectrochemical properties of the cell. |
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Keywords: | n-Cu2O electrodes Energy conversion Photoelectrochemical cell |
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