Evaluating the Potential of Lead‐Free Nontoxic Cs2BiAgI6‐Based Double Perovskite Solar Cell. Issue 2 (16th December 2022) - Alla, Mohamed
Abstract : Recently, the efficiency of single‐junction perovskite solar cells has been competing with the crystalline Si solar cells. However, the perovskite absorbers are toxic and susceptible to moisture. Herein, the performance of an environmentally benign and durable Cs2 BiAgI6 light harvester using the 1D Solar Cell Capacitance Simulator (SCAPS‐1D) software package is evaluated. The primary physical parameters, namely, defect and doping densities and thickness of the subsequent layers, are varied to achieve high efficiencies. The optimized Cs2 BiAgI6 ‐based double perovskite solar cells with three distinct hole‐transporting layers (HTLs) (i.e., MoO3, CuSCN, and spiro‐OMeTAD) deliver a power conversion efficiency of ≈29% with AZnO as electron transport layer (ETL). Further, a variety of possible rear electrodes are explored, and their effect on the performance is estimated. For real‐time examination of the Cs2 BiAgI6 ‐based double perovskite solar cells, the variation of power conversion efficiency (PCE) concerning the operating temperature is estimated. The thickness of the Cs2 BiAgI6 light harvester layer and the bulk defect density are the key aspects in attaining high power conversion efficiencies in Cs2 BiAgI6 ‐based double perovskite solar cells. Abstract : The intrinsic environmental instability and toxicity hinder the commercialization of halide perovskite light harvester‐based solar cells. Though several approaches are used to combat these problems, finding an environmentally benign light harvester that delivers high efficiency and long‐term stability is necessary. The Cs2 BiAgI6 presented herein shows high numerical efficiency.