Optimization of Structure of Solar Cells Based on Lead Perovskites (CH3NH3PbX3, X: I, Br) Via Numerical Simulation

In this paper, numerical simulation of perovskite solar cells (PSCs) for two structures (direct and inverted) and two perovskites (MAPbX3, MA: CH3NH3, X: I, Br) had been done by SCAPS software. Thickness of active layers (the perovskites) have been optimized by using PCE curves and then, electrical properties of the solar cells have been extracted. Results of simulations show that the best structure is inverted structure with active layer MAPbI3 which characteristics of the structure are 15.4%, 24.68 mA/cm^2, 8.48 V, and 73.74% for PCE, JSC, VOC, and FF, respectively. In addition, study of donors or acceptors density demonstrate that the parameter is so effective on performance of solar cells and PCE achieved to 18% by increase in the parameter.