NUMERICAL MODELING AND PERFORMANCE OPTIMIZATION OF THIN-FILM KESTERITE-BASED SOLAR CELLS

Abstract

This study investigates the numerical modeling and optimization of thin-film Cu2ZnSnS4 (CZTS) solar cells. CZTS is a cost-effective and environmentally friendly material with significant potential for photovoltaic applications. Key parameters such as absorber thickness, series and shunt resistances, acceptor concentration, and defect densities were optimized using SCAPS-1D simulation to enhance device performance. Also, the effect of hole mobility, electron affinity, back metal work function, and radiative and auger recombination was leveraged to reduce recombination losses and improving overall charge transport. The optimized CZTS solar cell achieved a power conversion efficiency (PCE) of 20.15%, significantly higher than the initial device with PCE of 5.56%. The study highlights the potential of CZTS-based solar cells for improving photovoltaic efficiency through modeling and performance optimization. Future work suggests exploring advanced simulations and alternative materials to push performance further and contribute to sustainable, high-efficiency solar technologies.