Faisal Alabdulkarem

Perovskite solar cells (PSCs) have emerged as a leading technology for indoor photovoltaic (IPV) applications due to their tunable bandgap, high power conversion efficiency (PCE), and suitability for low light environments. The increasing demand for energy-efficient, self-powered IoT devices highlights the need for optimized PSCs under artificial lighting. This thesis explores compositional and interfacial engineering strategies to enhance efficiency and stability under diverse indoor lighting conditions. The objectives include bandgap optimization through halide engineering, defect passivation, and the evaluation of structural, optical, and electrical properties of perovskite films. This work was focused on the double cation known as FAx-1CsxPb(Iy-1-Bry)3 composition with bandgaps of 1.55, 1.72, and 1.88 eV to match the indoor light spectrum .The optimized FA0.90Cs0.10Pb(I0.98-Br0.02)3 composition achieves a PCE of 31.3% under 250 lux, while FA0.85Cs0.15Pb(I0.55-Br0.45)3 reaches 36.6%. and FA0.85Cs0.15Pb(I0.15-Br0.85)3 achieves an exceptional PCE of 37.4%, demonstrating superior performance under low-intensity conditions. Compared to other indoor photovoltaics, these PSCs exhibit superior efficiency, highlighting their potential for next-generation energy harvesting. These findings advance perovskite photovoltaics for self-powered electronics, offering practical guidelines for optimizing device performance in applications such as IoT sensors and smart home devices.