Fig. 2
From: Understanding how excess lead iodide precursor improves halide perovskite solar cell performance

The changes in the EBIC signal during repetitive scans of cross-sectional samples. a Normalized EBIC signal vs. scan number for control-HaP (blue) and w/-PbI2-HaP (green). The EBIC signal of each sample is normalized to the maximum intensity of that sample. b Cross-sectional SEM images of the two samples with EBIC mapping of the cross section after various beam exposure. Scale bars, 500nm