Fig. 3

2D and 3D growth of MABiBrCl. SEM image of the perovskite MABiBrCl sample showing (a) initial morphology of the 2D flake-like structure and (b) its evolution into a 2D ‘lotus leaf-like’ structure.

2D and 3D growth of MABiBrCl. SEM image of the perovskite MABiBrCl sample showing (a) initial morphology of the 2D flake-like structure and (b) its evolution into a 2D ‘lotus leaf-like’ structure.