Publication date: 31st May 2020
How moisture impacts on halide perovskites and their performances is still matter of debate. Here we expose to humid treatments triple cation perovskites having over or under stoichiometric organic components. We monitor the evolution of perovskite crystalline structure, and we correlate it to changes in performances. Remarkably, we observe improved photovoltaic efficiency for treated films with an excess organic component, correlated with vertical orientation along the (100) plane.
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