CuInSe2-Based Photoelectrochemical Cells: Their Use in Characterization of Thin CuInSe2 Films, and as Photovoltaic Cells Per Se

    Research output: NRELTechnical Report

    Abstract

    Photoelectrochemistry has been employed to characterize the p-CuinSe2 component of the CdS/CuinSe2 photovoltaic cell. Using the junction between CuinSe2 on-metal and a nonaqueous electrolyte containing a redox couple not specifically adsorbed onto the semiconductor, we can test the films for photovoltaic activity and obtain effective electronic properties of them, before CdS deposition, in anondestructive manner. Electrochemical decomposition of CuinSe2 was investigated in acetonitrile solutions to determine the mechanism of decomposition (n & p) in the dark and under illumination. Electrochemical, solution chemical and surf ace analyses confirmed at the light-assisted decomposition of CuinSe2 resulted in metal ions and elemental chalcogen. On the basis of the results from theelectrochemical decomposition, and studies on the solid state chemistry of the (Cu2Se)x(In2se3) l-x system and surface analyses, the CuinSe2/polyiodide interface was stabilized and up to 11.7% conversion efficiencies were obtained.
    Original languageAmerican English
    Number of pages8
    StatePublished - 1984

    NREL Publication Number

    • NREL/TP-212-2329

    Keywords

    • electrochemical decomposition
    • photoelectrochemistry
    • photovoltaic cells

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