NaI Doping Effect on Photophysical Properties of Organic-Lead-Halide Perovskite Thin Films by Using Solution Process

Figure 1

Top view and cross-sectional view of the SEM images for Sample+0 M (a, b), Sample+0.75 M (c, d), Sample+0.9 M (e, f), and Sample+1.2 M (g, h).

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