Reconfiguring perovskite interface via R4NBr addition reaction toward efficient and stable FAPbI3-based solar cells (IMAGE)
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Researchers report two reaction mechanisms, substitution reaction or addition reaction, occur to the interaction between QABs and Pb-X octahedron. On this basis, ordered Pb-X adduct is in-situ grown on the perovskite interface, which can repair the imperfect interface. The resulting perovskite solar cells yield the efficiency of 23.89% with steady-state efficiency of 23.70%. The humidity stability of passivated cells is enhanced due to the passivation effect and hydrophobic characteristics.
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