Tunable hybrid perovskites with a narrow bandgap and multistage phase transition properties: 2,2-difluoroethylamine·antimony hexabromide

An organic–inorganic hybrid perovskite compound, [C 6 H 18 F 6 N 3 SbBr 6 ] (1), with an excellent triple reversible phase transition, dielectric switching properties, and a narrow bandgap of 2.90 eV was synthesized.