Temperature and volumetric effects on structural and dielectric properties of hybrid perovskites.

ABSTRACT: Three-dimensional organic-inorganic perovskites are rapidly evolving materials with diverse applications. This study focuses on their two representatives - acetamidinium manganese(II) formate (AceMn) and formamidinium manganese(II) formate (FMDMn) - subjected to varying temperature and pressure. We show that AceMn undergoes atypical pressure-induced structural transformations at room temperature, increasing the symmetry from ambient-pressure P2₁/n phase II to the high-pressure Pbca phase III. In turn, FMDMn in its C2/c phase II displays temperature- and pressure-induced ordering of cage cations that proceeds without changing the phase symmetry or energy barriers. The FMD⁺ cations do not order under constant volume across the pressure-temperature plane, despite similar

SUBMITTER: Nowok A 

PROVIDER: S-EPMC11365980 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature