Abstract
The effect on the stoichiometry of a copper sulphide electrode of short-circuiting the Cu/Cu aq 2+/Cu 2-δS/In galvanic cell for different times has been studied. This treatment has been carried out on the copper sulphide layer of CdS/Cu 2S solar cells prepared by different methods. The resulting changes of the spectral short circuit current and the I–V characteristics of the cells have been recorded. Remarkable increases in open circuit voltage, short circuit current, and fill factor have been observed as a consequence of any transformation that increases the proportion of copper in the copper sulphide films. Thus, this treatment could be a suitable method of improving the efficiency of CdS/Cu 2S solar cells.
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