Enhancing the Performance of All-Inorganic Perovskite Solar Cells by using AgInSe2 as a Current Augmentation Layer

Scholars became interested in perovskite solar cells (PSCs) because of their exceptional photovoltaic (PV) capabilities. All inorganic halide perovskite solar cells (AIHP-SC) demonstrated enhanced lifetime and outstanding stability against environmental conditions. The SCAPS-1D simulator is used in this study to build a low lead CsPb0.625Zn0.375I2Cl based AIHP-SC. The calculated open-circuit voltage (VOC) and short circuit current (JSC) are roughly 0.734V and 23.52mA/cm², respectively, and the associated power conversion efficiencies (PCE) are 14.39% when CsPb0.625Zn0.375I2Cl operated in a single heterojunction, especially in configurations like n-CdS/p-CsPb0.625Zn0.375I2Cl. In order to enhance device stability, charge separation, and spectral utilization, we proposed a novel dual-absorber design based on CsPb0.625Zn0.375I2Cl/AISe. The cell's current increases to 35.91 mA/cm² with a 26.88% efficiency when a thin AISe absorber film is included in that arrangement. The CGS BSF layer added in the CdS/p- CsPb0.625Zn0.375I2Cl /p⁺-AISe/p⁺⁺-CGS device subsequently causes the VOC rise to 1.015 V, which leads to PCE of 31.79%, JSC of 36.13 mA/cm2, and FF of 86.69%. In the context of PV cells, this opens up possibilities for PSCs in the combination CsPb0.625Zn0.375I2Cl /AISe experimental investigation.