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resultant films do not have power conversion efficiencies as large as those obtained for films prepared from other electrodeposition processes. For this process strict control of potential and solution composition is not required to deposit films having Cd/Se ratios close to 1.0. The films are less dense than those prepared using selenosulfite (3c). The bandgap of the film is dependent on the annealing temperature with the minimum bandgap occurring at 350~ or above. On the other hand, the maximum power conversion efficiency requires annealing temperatures of at least 500~ AcknowledgmentThis research was supported in part by a grant to M. C. from the Natural Sciences and Engineering Research Council of Canada. We thank Dr. R. T. Oakley for making us aware of phosphine selenides.