Novel One-Dimensional Organic–Inorganic Hybrid Halide Perovskite Material with Coexistence of High Phase Transition Temperature and Corresponding Dielectric Response

Organic–inorganic
hybrid perovskite materials have attracted
much attention because they combine the advantages of the organic
and inorganic components at the molecular level. Organic–inorganic
hybrid materials have both the structural variability and the flexibility
of organic components, as well as magnetic, electrical, and thermal
properties of inorganic components. A novel one-dimensional organic–inorganic
hybrid halide perovskite material [Et3NCH2Br][PbBr3] (compound 1) undergoes a high-temperature phase
transition at around 429.3 K, which is triggered by the order–disorder
change of cations. Differential scanning calorimetry, a dielectric
test, and single-crystal X-ray diffraction indicate that compound 1 exhibits structural phase transition from the P21/c to P63/m space group and a prominent dielectric anomaly.
Strikingly, the bandgap of compound 1 is 3.12 eV. It
is believed that our findings will contribute to an alternative pathway
for the design of multifunctional materials.