Fig. 4 | Nature Communications

Fig. 4

From: Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

Fig. 4

The quantitative elemental analysis during the degradation of MAPbI3. a Scanning electron microscopy (SEM) images with the atomic ratio for I/Pb acquired from the corresponding energy-dispersive X-ray spectroscopy (EDX) mappings in Supplementary Fig. 10, showing that the atomic ratio of I/Pb gradually decreases to 2. The beam was blank for a certain time indicated by the arrows after every spectrum was acquired. b A STEM image and the corresponding EDX mappings for the quantitative elemental analysis (Supplementary Table 2). Scale bar, 5 μm (a); 500 nm (b)

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