Two-dimensional organic–inorganic hybrid perovskite ferroelastics: (PEA)2[CdCl4], (3-FPEA)2[CdCl4], and (4-FPEA)2[CdCl4]

Three 2D organic–inorganic hybrid perovskites ferroelastics with dielectric switch. This work provides a new case for the preparation of 2D perovskite ferroelastic materials and the possibility for the application in actuators.