Incorporation of a second CsPbl3−yIy perovskite absorber layer (y = 1, 2, or 3) into CsPbl3-based perovskite solar cells, to improve their thermal stability and performance.

This article introduces a novel design approach for perovskite solar cells utilizing a CsPbI₃ absorber layer to achieve high efficiency while keeping manufacturing costs low. The proposed perovskite cell configuration includes a CsPbI₃ absorber layer, CdTe layer (HTL), IGZO layer (ETL), and fluorine-doped tin oxide (FTO) layer. Through the utilization of SCAPS-1D software, a comprehensive investigation was carried out to analyze the impact of various parameters such as temperature, doping concentration, bandgap energy, resistances (shunt and series), and wavelengths on the device's performance. Furthermore, an effective approach was implemented to boost efficiency by incorporating a secondary perovskite absorber layer CsPbCl_3−yI_y (y = 1, 2, or 3) into the CsPbI₃-based solar cell structure. These additional CsPbCl_3−yI_y (y = 1, 2, or 3) layers aid in minimizing recombination losses, improving optical properties, and addressing the V_oc deficit. The study revealed that integrating a second perovskite layer CsPbCl_3−yI_y (y = 1, 2, or 3) enhanced the efficiency of the FTO/IGZO/CsPbI₃/CdTe solar cell from 27.20 to 31.75%. [ABSTRACT FROM AUTHOR]