Halogen-regulating induced reversible high-temperature dielectric and thermal transitions in novel layered organic–inorganic hybrid semiconducting crystals

Two novel high- T perovskite crystals, [Cl-C 6 H 4 -(CH 2 ) 2 NH 3 ] 2 CdX 4 (X = Br 1; Cl 2), have been assembled, possessing evident thermal-dielectric anomalies, direct-band-gap characteristics and an enhanced temperature of 21 K from 1 to 2.