Photovoltaic Performance Metrics of CsSnI₃ Perovskite Solar Cells using SCAPS-1D

Abstract

Lead-based perovskite exhibits high efficiency but due to toxicity, research is shifting towards the lead (Pb)-free perovskite solar cells (PSCs), and it is generating substantial research interest currently. In this paper, we have investigated the performance of inorganic CsSnI 3 perovskite as the absorber layer of PSC using SCAPS-1D software. Our purposed device structure contains planar n-i-p FTO/Ti0 2 /CsSnI 3 /PTAA/Au with intrinsic CsSnI 3 as light absorber layer, n-type TiO 2 (Titanium dioxide) and organic p-type PTAA (Poly triaryl amine) as electron transport layer (ETL) and hole transport layer (HTL) respectively. The photovoltaic performance is estimated by varying the absorber $CsSnI_{3}$ layer parameters such as thickness, doping density, and defect density (Nt). Finally, the device displays a high-power conversion efficiency (PCE) of 22.54%, with a fill factor (FF) of 79.7%, open circuit voltage (Voc) of 0.812 V, and short circuit current density (Jsc) of 34.75 mA/cm ² . From this thorough analysis, we can say that $CsSnI_{3}$ perovskite could be used efficiently instead of lead (Pb)-based perovskite.