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Primary Examiner: Tung, T.
Assistant Examiner: Weisstuch, Aaron
Attorney: Nesbitt; John R.

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Title: Reversible photogalvanic cells for the conversion of solar radiation into electricity

Abstract: A device to convert solar energy into electricity, making use of the reversible photogalvanic principle. This principle is based on the spontaneous light and dark reactions between two electrochemical half cells constructed from a reversible electrochemical reaction. The device uses photosensitizers that operate in a broad band infrared spectral region. The specific photosensitizer used is chlorophyll a coated on a platinum electrode suspended in an ionic salt solution on one side of the cell and a platinum electrode is also suspended on the other side of the half cell in a hydroquinone solution, and the electrodes are electrically connected, these solutions are interconnected by a salt bridge which permits the flow of cation charge reversibly between said first and second half cells upon on-off light irradiation of the chlorophyll coated electrode.

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Inventors: Fong, Francis K. (Lafayette, IN, US)
Winograd, Nicholas (Lafayette, IN, US)

Application Number: 649090
Filing Date: 1976-01-14
Publication_date: 1977-05-10
Assignee: Purdue Research Foundation (Lafayette, IN)
Primary Class(es): 429/105 429/111
Other Classes:
US Patent Ref:
Other Refs: Other References: C. W. Tang et al. "Photovoltaic Effects of Metal-Chlorophyll-a-Metal Sandwich Cells," J. Chem. Phys. 62, 2139-2149 (Mar. 1975).
C. W. Tang et al. "Transient Photovoltaic Effects in Metal-Chlorophyll-a-Metal Sandwich Cells," J. Chem. Phys. 63, 953-961 (July 1975).
Chem. Abstr. 79, 59943n (1973); 82, 14142c (1975).
V. B. Yevstigneyev et al. "Effect of Acidity of the Medium on the Photopotential and Change in pH on Interaction of Chlorophyll with Hydroquinone in Different Solvents," Biofizika, vol. 18, No. 1, pp. 53-58 (1973).
Y. M. Stolovitskii et al., "Photochemical and Photoelectronic Properties of the Components of the Photosynthetic Apparatus-I. Photogalvanic Effect with Constant Illumination of Films of Chlorophyll," Biofizika, vol. 19, No. 5, pp. 820-825 (1974).