Fig. 1: Crystal growth habits of 2D perovskites. | Nature Communications

Fig. 1: Crystal growth habits of 2D perovskites.

From: Two-dimensional organic-inorganic hybrid perovskite quantum-well nanowires enabled by directional noncovalent intermolecular interactions

Fig. 1

a Schematic crystal structure of 2D perovskite (LA)2PbI4, where LA+ is a large organic ammonium cation. b, Molecular structures of various spacer cations. c, d Optical images of various 2D perovskite crystals, showing more plate-like morphologies (c) and more needle-like morphologies (d). All scale bars are 2.7 mm. e–g Optical and atomic force microscope (AFM) images of (PEA)2PbI4 (e), (PMA)2PbI4 (f), and (ABA)2PbI4 (g) microcrystals showing the screw dislocation cores. Scale bars in the optical images are 20 μm. Scale bars in the AFM images are 2 μm, 500 nm, and 500 nm, respectively.

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