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Antimony chalcogenides, Sb₂S₃ and Sb₂Se₃, are the promising candidates for next generation solar cells due to its non-toxicity, earth abundance, low cost and easy availability. In this work, Sb₂S₃ and Sb₂Se₃ hetero-junction solar cells are modeled, numerically analyzed and compared by the SCAPS (Solar Cell Capacitance Simulator) software. Initial simulation for configuration optimization was done in detail for absorber layer thickness, buffer layer thickness, acceptor density, radiative recombination coefficient, series-shunt resistance, defect density and the work function of the back contact. A detailed analysis of the junction characteristics like carrier generation and recombination, built-in electric field and capacitance-voltage (C-V) study was also done in the second stage to determine the carrier lifetime, depletion width, built-in potential and doping density.

The present study shows that, the optimum thickness …