Defect-less Formamidinium Sn-Pb Perovskite Grown on Fluorinated Substrate with Top-down Crystallization Control for Efficient and Stable Photovoltaic

Ideal bandgap formamidinium tin-lead perovskite (FASn0.5Pb0.5I3) is appealing for fabricating thermally stable single-junction and tandem perovskite photovoltaics. Nevertheless, the obtain of high device efficiency is limited to the preparation of...