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

Figure 3

XRD patterns of perovskite films with Sample+0 M, Sample+0.75 M, Sample+0.9 M, and Sample+1.2 M: (a) whole patterns; (b) enlargement of (110) crystal plane; (c) enlargement of (220) plane.

(a)

(b)

(c)