KEYWORDS: Perovskite, Solar cells, Humidity, Chemical analysis, X-rays, Spectroscopes, Spatial resolution, Solar energy, Scanning transmission electron microscopy, Luminescence
Improving the stability of lead halide perovskite (LHP) solar cells is a major challenge towards their industrialization. It has been shown that moisture induces changes in the global Perovskite Solar Cell (PSC) performances. Here we investigate the chemical and structural evolution of hybrid cation mixed halide perovskite after aging under controlled humidity. We perform Photoluminescence, Energy Dispersive X-ray Spectroscopy in a STEM, and Cathodoluminescence analyses of triple cation perovskite (Cs0.05MA0.45FA0.5Pb(I0.83Br0.17)3) integrated into an efficient solar cell. We observe optical and chemical variations correlated with morphology changes at a microscopic scale, and we analyze the structural changes of the perovskite layer.
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