RT Journal Article
T1 Pressure-induced reversible framework rearrangement and increased polarization in the polar [NH<sub>4</sub>][Cd(HCOO)<sub>3</sub>] hybrid perovskite
A1 Bermúdez García, Juan Manuel
A1 García Fernández, Alberto
A1 Andrada Chacón, Adrián
A1 Sánchez Benítez, Francisco Javier
A1 Ren, Wei
A1 Hu, Shunbo
A1 Gu, Teng
A1 Xiang, Hongjun
A1 Biczysko, Malgorzata
A1 Castro-García, Socorro
A1 Sánchez-Andújar, Manuel
A1 Stroppa, Alessandro
A1 Señarís-Rodríguez, María Antonia
AB In this work, we study the structural changes of the polar [NH4][Cd(HCOO)3] hybrid perovskite under external hydrostatic pressure. We report a reversible framework rearrangement as a function of pressure characterized by: (i) a gradual modification of one formate ligand, which changes its coordination mode from a bridging syn–anti mode at atmospheric pressure (LP-phase) to a chelating-anti mode at high pressure (HP-phase) and (ii) a change in the coordination of the Cd2+ cations from six-coordinated (LPphase) to hepta-coordinated (HP-phase). Very interestingly, this unprecedented framework arrangement displays a large electrical polarization. For instance, the polarization value observed at p = 17.7 GPa is about four times the polarization at atmospheric pressure. Therefore, we report that the external pressure induces a novel framework rearrangement in the polar [NH4][Cd(HCOO)3] hybrid perovskite withenhanced electrical polarization. This structure–property relationship offers new insights for designing novel ferroelectric materials based on pressure-responsive hybrid perovskite materials.
PB Royal Society of Chemistry
SN 2052-1553
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/116511
UL https://hdl.handle.net/20.500.14352/116511
LA eng
DS Docta Complutense
RD 22 mar 2026