Design and numerical simulation of lead-free inorganic perovskites (Cs₂BiAgI₆) solar cell through computation method

Cs₂BiAgI₆ is a lead-free inorganic perovskite material exhibits exceptional photoelectric characteristics and great environmental stability. HTL/Cs₂BiAgI₆is/ETLs solar cells was investigated numerically by using SCAPS 1-D Capacitance Simulator. IGZO, TiO₂, WO₃, MoO₃, and SnO₂ have been chosen as ETLs, while CuO, CuI, and MoO₃ are as HTLs. The values of electrical parameters were calculated as function of thickness of the absorber layer, ETLs, HTLs, interface defect densities, doping densities, and working temperature. Comparative study shows that best configuration of obtain solar cell is MoO₃/Cs₂BiAgI₆/IGZO. The obtain value of Jsc, Voc, FF and PCE are 23.80 mA/cm², 1.193 V, 83.46 %, 23.711 % respectively. The value of quantum efficiency is 80-90 % in the range of 350-750 nm. These results will open the door for the widespread use of stable and environmentally friendly perovskite solar cells by providing theoretical recommendations for high performance of Cs2BiAgI6 based photovoltaic solar cells (PSCs).