Novel Inorganic–Organic Heterojunction Solar Cell-Based Perovskite Using Two Absorbent Materials

Abstract

The main objective of this work is to study and optimize by simulation a proposed perovskite solar cell (PSC) model. The model is a two-layer perovskite solar cell in which the two perovskite materials CH3NH3PbI3 (MAPI) and HC(NH[Formula: see text]PbI3 (FAPI) form the active layer of the cell, according to the configuration Pt/CuSbS2/CH3NH3PbI3/HC(NH[Formula: see text]PbI3/ZnO/FTO. The simulations were performed using SCAPS 1D software. The optimized parameters are mainly the thicknesses of the active sub-layers (MAPI and FAPI), and the parameters associated with these materials such as defect density and doping density. The defect densities of the CuSbS2/MAPI, MAPI/FAPI, and MAPI/ZnO interfaces have also been optimized. The best results were obtained for an optimal thickness of 1200[Formula: see text]nm, an acceptor doping density of 10[Formula: see text][Formula: see text]cm[Formula: see text], and a defect density of 10[Formula: see text][Formula: see text]cm[Formula: see text] for each active sub-layer (MAPI and FAPI). For the defect densities of the three interfaces, the density 10[Formula: see text][Formula: see text]cm[Formula: see text] was found as the optimal density. The optimized cell has an open circuit voltage of 1.519[Formula: see text]V, a short circuit current density of 27.79[Formula: see text]mA/cm2, a fill factor of 91.31%, and a power conversion efficiency of 38.53%.