a numerical study of new structure of czts/si based heterojunction

Abstract

This project focuses on simulating and optimizing a tandem photovoltaic solar cell using the one-dimensional simulation tool SCAPS. The primary objective is to enhance the performance of the solar cell by determining optimal parameters such as the thickness, band gap, and doping concentration for the bottom layer based on CZTS/SI. The findings indicate that by fine-tuning specific layer parameters, notable enhancements in electrical performance were achieved. The optimized configuration resulted in remarkable improvements across key metrics, including a high fill factor (FF) of 85.18% and an impressive overall efficiency of 22 %. These outcomes highlight the significant impact of optimizing layer parameters on the performance of the system. furthermore, a top layer perovskite solar cell (CsPbI2br) was integrated into the system based on prior studies. The initial parameters for this layer included a fill factor of 78 % and an overall efficiency over 19 %. To further optimize the tandem structure, variations were introduced in the thickness and band gap. Remarkably, the best results achieved with these modifications were an increased fill factor of 80 % and an improved overall efficiency over 40%. This demonstrates the significant impact of adjusting the layer characteristics on the overall performance of the solar cell system.