Figure 18.

Properties of 2D organic perovskites: a) Absorption spectrum. Reproduced with permission.^{[ 202 ]} Copyright 2015, American Association for the Advancement of Science. b) Ion migration. Reproduced with permission.^{[ 180 ]} Copyright 2016, American Chemical Society. c) Long‐charge diffusion length. Reproduced with permission.^{[ 203 ]} Copyright 2013, American Association for the Advancement of Science. d) Flexibility. Reproduced with permission.^{[ 140 ]} Copyright 2017, Royal Society of Chemistry. e) Bandgap tunability. Reproduced with permission.^{[ 179 ]} Copyright 2014, American Chemical Society. f) Ferroelectric behavior. Reproduced with permission.^{[ 204 ]} Copyright 2015, American Chemical Society. g) Dynamic movement of cations. Reproduced with permission^{[ 205 ]} Copyright 2015, Nature Publishing Group.