Over 35% efficiency of three absorber layers of perovskite solar cells using SCAPS 1-D

Perovskite solar cells (PSCs) have drawn significant scientific interest due to their promising combination of high power conversion efficiency and cost-effectiveness. This study focuses on optimizing the power conversion efficiency (PCE) of PSCs by employing absorber layers comprising CH3NH3SnI3 and FASnI3. The Solar Cell Capacitance Simulator (SCAPS) is used to investigate various parameters, including layer thickness, defect densities (Nt), bandgap values, and temperature. The most efficient configuration is found with 390 nm layer thickness, Nt at 2E13 cm3, and optimized bandgap values. The study reveals impressive electrical parameters, including an open-circuit voltage (Voc) of 1.23 V, short-circuit current density (Jsc) of 33.43 mA/cm2, a high fill factor (FF) at 88.64%, and a substantial PCE of 35.73%. These findings underscore the potential for achieving superior PSC efficiency through parameter optimization. The utilization of CH3NH3SnI3 and FASnI3 absorber layers holds great promise for enhancing PSC performance. This research provides valuable insights into optimizing PSCs, offering implications for the advancement of cost-effective and efficient photovoltaic technologies.