Design and parametric optimization of lead free perovskite based tandem solar cell for higher efficiency

Abstract

A critical concern is the creation of effective and eco-friendly photovoltaic materials. The non-toxic perovskite substance methyl ammonium germanium tri-iodide (MAGeI3) has several applications in tandem solar cells. In this research, the efficiency of a multi-junction tandem solar cell with MAGeI3 as the absorbent layer in the top cell and FeSi2 as the absorbent layer in the bottom cell was examined by a thorough simulation utilising SCAPS-1D software. The simulation took into account several variables, including the thickness, energy level, bandgap, and carrier concentration of the various layers. According to the simulation’s findings, the efficiency is 27.25% and the fill factor (FF) is around 80%. MAGeI3 is a safe and effective substitute material compared to other lead-containing perovskite materials. This work emphasises the potential of (MAGeI3) as a productive and eco-friendly component for tandem solar cells.