Figure 2: Local changes in photoluminescence (PL) over time under illumination. | Nature Communications

Figure 2: Local changes in photoluminescence (PL) over time under illumination.

From: Photo-induced halide redistribution in organic–inorganic perovskite films

Figure 2

(a) Correlated scanning electron microscopy (SEM) image and (b) fluorescence image of a perovskite film measured in nitrogen with pulsed photo-excitation (470 nm, 40 MHz repetition rate, 0.03 μJ cm−2 per pulse) with semitransparent SEM image overlaid, scale bars, 2 μm. (c) PL intensity over time from a dark spot (blue circles, enhancement of 8.7 ×), intermediate spot (green squares, enhancement of 1.6 ×) and a bright spot (red triangles, enhancement of 1.4 ×) corresponding to the regions highlighted with the same symbols in b, with photo-excitation at 532 nm (188 mW cm−2, 3 suns).

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