Optimization of highly efficient inorganic lead-free double perovskite solar cells via SCAPS-1D

A planar architecture double perovskite solar cell (DPSC) has been proposed and modeled employing Pb free La2NiMnO6 absorber layer. In present work, fluorine-doped tin oxide (FTO) is employed as transparent electrode, tungsten disulfide (WS2) is used as ETL, cuprous oxide (Cu2O) as HTL and La2NiMnO6 material is utilized as an absorber layer using the simulation program Solar Cell Capacitance Simulator-One Dimensional (SCAPS-1D). Notably, the configuration of the proposed device is FTO/WS2/La2NiMnO6/Cu2O/Au which demonstrates power conversion efficiency (PCE) of 11.41%. Several parameters affecting device performance such as absorber thickness, defect density, series and shunt resistance, interface defect density and various back metal contacts are studied and optimized. The structure exhibits PCE 18.89%, fill factor (FF) 85.52%, open-circuit voltage (Voc) 0.7919 V, and current density (Jsc) 27.89 mA/cm2. The results of the current work might be beneficial for researchers in designing low-cost, highly efficient, and non-toxic inorganic DPSC.