Enhancing the efficiency and stability of Non_Toxic RbSn0.5Ge0.5I3_Based perovskite solar cells through optimization

Abstract

In the search for alternatives to toxic lead-based perovskite materials, RbSn0.5Ge0.5I3 has emerged as a promising candidate. It offers a nontoxic composition while holding favorable photovoltaic properties. This investigation concentrates exclusively on the utilization of RbSn0.5Ge0.5I3 in perovskite solar cells (PSCs), employing SCAPS_1D simulations to evaluate its performance. Through systematic investigation of a range of parameters such as the thickness of the perovskite layer, the effect of different HOLE TRANSPORT LAYER (HTL) materials, ELECTRON TRANSPORT LAYER (ETL) doping concentration, HTL doping concentration, the defect density of perovskite layer, the defect density of ETL/absorber and absorber/HTL interface, the defect density of ETL and HTLs, series resistance, shunt resistance, various back contacts, and also the temperature on the performance of perovskite solar cells. This investigation aims to optimize the efficiency and stability of RbSn0.5Ge0.5I3-based PSCs. The optimized device displayed a power conversion efficiency (PCE) of 24.28 %, fill factor (FF) of 78.48 %, and quantum efficiency (QE) of 100 % in the visible range. By revealing the potential of this material in renewable energy applications, the research contributes to the advancement of sustainable photovoltaic technologies. The toxicity of lead-based perovskite materials has been a concern in the development of perovskite solar cells. The investigation for low-toxicity alternatives has led to the exploration of different materials, including Sn_based halide perovskites. The development of stable and efficient perovskite solar cells is required for the advancement of renewable energy technologies, and the research on RbSn0.5Ge0.5I3_based PSCs contributes to this purpose. Future work will focus on enhancing the scalability of RbSn0.5Ge0.5I3 solar cells, exploring tandem configurations with other photovoltaic materials, and conducting long-term stability assessments in real-world conditions to further validate its commercial viability.