Formation of a Mixed Valence Sn3F8 Phase May Explain the SnF2 Stabilizing Role in Tin-Halide Perovskites

Daniele Meggiolaro,Luca Gregori,Filippo De Angelis

ACS ENERGY LETTERS（2023）

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摘要

SnF2 is a common additive stabilizing tin-halide perovskites. We propose that this effect is due to formation of a mixed valence Sn3F8 phase which sequesters oxidized species from the perovskite environment.

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