Читать книгу Materials for Solar Energy Conversion - Группа авторов - Страница 53

Copper zinc tin sulfide is a forth order semiconducting compounds, increasing interest toward application of solar PV cells. Similar to this material, namely, sulfur selenium alloy, copper zinc tin selenide. These materials have electronic and optical properties same as that of cadmium indium gallium diselenide; hence, it is well suited for solar PV cells applications. It comprises abundant availability and harmless elements. It improves efficiency of solar cells upto 12% compared to cadmium-based and crystalline-based solar cells, and more effort is required to be commercialized in the market [10]. Copper zinc tin sulfide belongs to forth order compound as shown in Figure 2.6. Copper zinc tin sulfide PV cell can attain by replacing the bivalent Zink, trivalent indium, and gallium and tetravalent tin, which forms like kesterite structure. Few authors are reported this PV cell structure in the forms of stannite structure but it is not clear as much of kesterite structure. Crystal energy for stannite is 2.86 meV per atom higher compared to kesterite structure [23]. However, common defect occurred is structure resolution retarded by disarray of the copper and zinc cations.