Design and numerical investigation of cadmium telluride (CdTe) and iron silicide (FeSi₂) based double absorber solar cells to enhance power conversion efficiency

Inorganic CdTe and FeSi2-based solar cells have recently drawn a lot of attention because they offer superior thermal stability good optoelectronic properties compared to conventional cells. In this work, unique alternative technique is presented by using FeSi2 as secondary absorber layer In2S3 the window for improving photovoltaic (PV) performance parameters. Simulating on SCAPS-1D, proposed double-absorber (Cu/FTO/In2S3/CdTe/FeSi2/Ni) structure thoroughly examined analyzed. The thickness, acceptor density (NA), donor (ND), defect (Nt), series resistance (RS), shunt (Rsh) were simulated in detail optimization above configuration improve PV performance. According study, 0.5 um optimized thickness both layers order maximize efficiency. Here, value optimum 50 nm. For single absorber, efficiency achieved 13.26%. But dual enhanced obtaining 27.35%. other parameters are also improved values fill factor (FF) 83.68%, open-circuit voltage (Voc) 0.6566V, short circuit current (JSc) 49.78 mA/cm2. Furthermore, model performs at 300 K operating temperature. addition cell has resulted significant quantum (QE) enhancement rise spectrum absorption longer wavelengths. findings work promising approach producing high-performance reasonably priced CdTe-based