Design and Evaluation of Thin Film Solar Cells Based on CZTS (Se) with SnO2 TCO and CdS(Se)

Abstract

Efficient solar cell design has gained attention for several years because of its many advantages over conventional power sources. Different materials have been used to increase the efficiency. This research investigates the characteristics of a thin-film solar cell. The cell is designed using a kesterite-based absorbing layer, including bilayers made out of SnO₂ (FTO) and undoped SnO₂ (TO) as the Transparent Conducting Oxide (TCO). CdS/CdSe acts as the buffer layer. Extensive simulation experiments are conducted to analyze the performance of the model. The simulation results reveal that at room temperature and intensity of light with 1000 W/m², the efficiency of the proposed cell is 17.67% for 1 µm CdSe/Cu₂ZnSnSe₄. The open circuit voltage is 505.3 mV. 44.81 mA/cm² short circuits current is obtained. Changing the orientation increased efficiency to 21.36% with CdSe/CZTS solar cell.