CuInSe//2 -BASED PHOTOELECTROCHEMICAL CELLS: THEIR USE IN CHARACTERIZATION OF THIN CuInSe//2 FILMS, AND AS PHOTOVOLTAIC CELLS PER SE.

Photoelectrochemistry has been used to characterize the p-CuInSe//2 component of the CdS/CuInSe//2 on-metal and a nonaqueous electrolyte containing a redox couple not specifically adsorbed onto the semiconductor it is possible to test the films for photovoltaic activity and obtain effective electronic properties for photovoltaic activity and obtain effective electronic properties for them, before CdS deposition, in a nondestructive manner. Electrochemical decomposition of CuInSe//2 was investigated in ap) in the dark and under illumination. Electrochemical, solution chemical and surface analyses confirmed at the light-assisted decomposition of CuInSe//2 resulted in metal ions and elemental chalcogen. On the basis of the results in metal ions and elemental chalcogen. On the basis of the results from the electrochemical decomposition and studies on the solid state chemistry of the (Cu//2Se)//x(In//2Se//3z0//1// minus //x system and surface analyses, the CuInSe//2/polyiodide interface was stabilized, and up to 11. 7% conversion efficiencies were obtained.