Towards high-efficiency flexible lead-free RbGeI3 perovskite solar cells: numerical insights from SCAPS-1D
Lead-free perovskite materials have attracted increasing attention as viable substitutes for conventional lead-based absorbers in next-generation photovoltaic technologies. In this study, the performance of a flexible perovskite solar cell (FPSC) employing rubidium germanium iodide (RbGeI3) as the absorber material was...