Fig. 2: Degradation of Sn perovskite under ambient air. | Nature Communications

Fig. 2: Degradation of Sn perovskite under ambient air.

From: Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide

Fig. 2

a Time evolution of the (100) XRD reflection of (PEA)0.2(FA)0.8SnI3 films exposed to ambient air at 100 °C (top; inset: absorbance spectra of SnI4 dissolved in 3 mL of toluene after its sublimation from the heated film and capture in a Petri dish during different times) and room temperature (bottom; inset: magnification of peaks corresponding to 60 min and 24 h). Peaks labelled with * correspond to FA2SnI6. b Adsorption of an O2 molecule on a (001) surface of FASnI3 perovskite and charge density difference, which highlights bond formation between O and Sn atoms (from DFT simulations). Yellow and green charge densities refer to electron accumulation and depletion respectively (with an isosurface value of 0.006 Å−3).

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