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Conversion of visible light to electrical energy - Stable cadmium selenide photoelectrodes in aqueous electrolytesStabilization of n-type CdSe to photoanodic dissolution is reported. The stabilization is accomplished by the competitive oxidation of S(--) or S(n)(--) at the CdSe photoanode in an electrochemical cell. Such stabilized cells are shown to sustain the conversion of low energy (not less than 1.7 eV) visible light to electricity with good efficiency and no deterioration of the CdSe photoelectrode or of the electrolyte. The electrolyte undergoes no net chemical change because the oxidation occurring at the photoelectrode is reversed at the cathode. Conversion of monochromatic light at 633 nm to electricity is shown to be up to approximately 9% efficient with output potentials of approximately 0.4 V. Conversion of solar energy to electricity is estimated to be approximately 2% efficient.
Document ID
19780069421
Document Type
Conference Proceedings
Authors
Wrighton, M. S. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Ellis, A. B. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Kaiser, S. W. (MIT Cambridge, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
ENERGY PRODUCTION AND CONVERSION
Meeting Information
Symposium on Solid state chemistry of energy conversion and storage(New York, NY)
Distribution Limits
Public
Copyright
Other