An international research team has proposed a novel perovskite solar cell architecture incorporating a thin tetraphenyl-porphine zinc interfacial layer to enhance surface potential, passivate defect states, and improve charge transport, leading to improved device efficiency and operational stability with power conversion efficiencies exceeding 13%. The surface potential of cesium lead iodide bromide (CsPbIBr2) perovskite solar cells is enhanced by depositing a thin layer of tetraphenyl-porphine zinc (TPP-Zn) onto the active layer, enabling simultaneous suppression of surface defects and enhancement of charge carrier dynamics. Researchers have developed an optimized CsPbIBr2 perovskite solar cell with a peak efficiency of 13.47% and impressive performance metrics, demonstrating a promising approach for stable and high-performance inorganic perovskite solar cells. This study showcases a successful collaboration among scientists from various universities, as detailed in the article "Surface engineered wide-bandgap all-inorganic perovskite solar cells achieve a fill factor exceeding 82%."