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The vast majority of high‐performance perovskite solar cells (PSCs) are based on multi‐cation mixed‐anion compositions incorporating methylammonium (MA) and bromide (Br). Nevertheless, the thermal instability of MA and the tendency of mixed halide compositions to phase segregate limit the long‐term stability of PSCs. However, reports of MA‐free and/or Br‐free compositions are rare in the community...
In spite of a continuous increase in their power conversion efficiency (PCE) and an economically viable fabrication process, organic–inorganic perovskite solar cells (PSCs) pose a significant problem when used in practical applications: They show fast degradation of the PCE when exposed to very humid environments. In this study, the stability of PSCs under very humid conditions is greatly enhanced...
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