Black-phase formamidinium lead iodide (α-FAPbI3) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI3. We show that the classic solvent system for perovskite …
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A crystal capping layer for formation of black-phase FAPbI3 perovskite in humid air | Science
