Methyl ammonium lead iodide (MAPbI3) was one of the earliest perovskite formulations examined, which created tremendous interest in these materials given their stupendous rise in power conversion efficiency (PCE). Beyond MAPbI3, new perovskite formulations have emerged, such as the triple cation (Cs0.05FA0.79MA0.16PbI2.45Br0.55) absorbers, which have further advanced research in emerging photovoltaics in addition to other types of optoelectronics sensors. Given the stability issues with many of the perovskites, here we explore how the environmental ambient influences the device stability through in-use testing.
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