Numerical Simulation and Performance Optimization of All Inorganic CsPbI ₂ Br Perovskite Solar cell Using SCAPS-1D

There is an increasing demand of power generation in the world. Lately, there has been an increased interest in third-generation thin-film solar cells. The design and study of lead-based Perovskite solar cells are the focus of this work. The components of the architecture $\mathrm{ITO} / \mathbf{Z n O} / \mathrm{CsPbI}_{2} \mathrm{Br} / \mathrm{CZTSe} /$ back contact (Au). The simulation makes use of the SCAPS-1D software to examine the performance and efficiency of this solar cell. Numerous factors were examined, including the impact of thickness, the absorber layer’s band-gap variation, bandgap, absorber defect density, temperature, and J-V graph. Based on simulation work, the device’s initial structure has an efficiency of 14.75%, respectively. It is discovered that the solar cell device’s final optimum performance characteristics are improved with a short-circuit current density (Jsc) of 20.59 $\mathrm{mA} / \mathrm{cm} 2$, an open-circuit voltage (Voc) of $\mathbf{1. 1 4 4 8} \mathrm{V}$, a fill factor (% FF) of 66.11%, and a power conversion efficiency (% PCE) of $\mathbf{2 0. 3 0 \%}$ after the SCAPS simulation with the optimization of basic parameters in this work.