Characterization of Perovskite Solar Cell with Fe Doped TiO₂ Layer.

Recently, single-crystal silicon solar cells have achieved efficiencies of 25%. However, their production is energy-demanding and relatively expensive. Therefore, photovoltaic cells based on organic- inorganic hybrid perovskites have attracted considerable attention owing to their high conversion efficiencies, simple preparation, and potentially low production costs. In this study, we investigated the effect of Fe doped into a compact and mesoporous layer of TiO₂ on the efficiency of the resultant perovskite solar cell (PSC). The efficiencies achieved for PSCs with Fe/TiO₂ were higher than those for cells with pure TiO₂ nanoparticles. The samples were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible spectroscopy, and current-voltage measurements. The photoelectrode PSC exhibited a high light-to-electric-energy conversion efficiency under a simulated solar light irradiation of 100 mW/cm² (AM 1.5). Our results suggest that Fe nanoparticles in the TiO₂ layer may contribute to the performance improvement of the PSC.