Fig. 23: Mapping ionic diffusion in MAPbI3 perovskite films using Scanning electron microscopy and energy dispersive X-ray measurements.
From: Advanced spectroscopic techniques for characterizing defects in perovskite solar cells
EDS study of Br diffusion in MAPI film, a Experimental setup for the ion diffusion study, b, c SEM and EDS Bromine-distribution images of a PbBr2 particle without illumination, d, e SEM and EDS Bromine-distribution images of a PbBr2 particle after illumination, The EDS line scans of the Br-element on the f MAPI polycrystalline film and h MAPI single crystal with and without illumination, g The EDS line scans of the Br element on the polycrystalline film under illumination at 293 and 323 K. Reproduced with permission from ref. 111, copyright (Royal Society of Chemistry, 2016).
