Figure 13.

Depth‐dependent grazing incident X‐ray diffraction patterns of the FASnI₃ and FASnI₃‐FOEI perovskite films after antisolvent dripping a) without or b) with thermal annealing at different incident angles. The ×5 in (a) left and (b) left means that the original intensity is multiplied by 5 in this image to clearly show the tendency. c) Possible scenarios of the surface‐controlled growth of the FASnI₃–FOEI perovskite films. a–c) Reproduced with permission.^{[ 162 ]} Copyright 2020, Elsevier.