A transformation of the surface of CdSe and CdS single crystal photoanodes under illumination in sulfide/polysulfide redox electrolytes to polycrystalline or amorphous CdS has been found. A reaction mechanism is proposed and its thermodynamics are discussed. The discovered transformation could cause problems for the application of these systems for electrochemical solar cells.
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Gerischer et al. (1978) studied this question.
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