Performance Improvement of Hybrid-Perovskite Solar Cells with Double Active Layer Design Using Extensive Simulation

The widespread results of the explicit modeling technique for hybrid-perovskite-based solar cells under the illumination spectrum of AM 1.5G are illustrated in the present simulative work. The research specifically aims to improve the overall device efficiency by considering innovative double perovskite hybrid-absorber layers (ALs). The perovskite solar cells (PSCs) offer high efficiency with hybrid and lead-free material, i.e., copper indium gallium selenide (CIGS) as well as cesium tin iodide (CsSnI3). The present study utilizes Spiro-OMeTAD and ZnO as the carrier transport layers; as the electron–hole transport layer is sandwiched with the PALs of CIGS and CsSnI3, it has precise bandgap values of 1.3 and 1.27 eV, respectively. Using double-graded materials of CIGS/CsSnI3 results in an optimized efficiency of up to 26.55%. The comprehensive investigation of thicknesses, bulk defect densities, and temperature dependency of the current device configurations are also investigated.