Design and performance evaluation of eco-friendly FASnI3/CsSn0.5Ge0.5I3 based perovskite solar cell with distinct charge transport layer: A computational modeling

This article provides a comprehensive analysis and exploration of a novel design approach for Perovskite Solar cells (PVKSC) that incorporates two absorber layers, with a specific focus on their potential applications in energy generation. This research employs a computational modeling approach to conduct a thorough examination of PVKSCs based on FASnI3/CsSn0.5Ge0.5I3. The primary objective of this study is to examine and choose the appropriate materials for the hole transport layer material (HTLM) and the electron transport layer material (ETLM). Additionally, the research aims to identify the optimal parameters for the active thickness layer, trap concentration, energy bandgap, interface trap concentration, and acceptor concentration for PVKSC. Through the optimization of the device's parameters, notable improvements are observed. The power conversion efficiency (PCE) is enhanced to 33.16 %, while the current density (Jsc) experiences an increase to 31.218 mA/cm2. Additionally, the open circuit voltage rises to 1.185 V, and the fill factor demonstrates improvement, reaching 89.58 %. These advancements are achieved by employing Zn3P2 as the HTLM and SnS2 as the ETLM in the design. This research emphasizes the optimistic prospects of lead-free PVKSC and presents novel opportunities for their advancement and utilization in diverse solar contexts.