Photosensitivity of structures based on I-IIIn-VIm ternary compounds containing ordered vacancies

Homogeneous crystals of CuIn3Se5 , CuGa3Se5 , and CuGa5Se8 ternary compounds were grown, and their physical and chemical properties were investigated. Photosensitive structures were fabricated for the first time on the basis of these compounds, and the spectral dependence of the relative quantum photoconversion efficiency was measured. The bandgap of these compounds was also estimated, and it was shown that direct interband transitions are typical in them. It was found that the content and chemical nature of atoms forming an elementary cell in a I-IIIn-VIm ternary compound control the relevant band gap. (C) 2002 MAIK "Nauka / Interperiodica".