Abstract
In this paper, the performance of a double junction solar cell with a novel structure, i.e., made up of two layers of copper zinc tin sulfide (CZTS) & copper indium gallium diselenide (CIGS) and two layers of anti-reflector coatings namely zinc telluride (ZnTe) and cadmium sulfide (CdS) on the top layer of the cell are studied and optimized. To obtain an optimized performance, the effect of CIGS band gap changes on the efficiency is studied. For establishing the current matching in two sub-cells, the effect of thickness of ZnTe and CdS anti-reflectors layers is investigated for optimum short circuit current. The optimized proposed double junction CZTS/CIGS solar cell has an efficiency and fill factor of 45.37% and 86.37%, respectively.
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