Tailoring the coercive field in ferroelectric metal-free perovskites by hydrogen bonding.

ABSTRACT: The miniaturization of ferroelectric devices in non-volatile memories requires the device to maintain stable switching behavior as the thickness scales down to nanometer scale, which requires the coercive field to be sufficiently large. Recently discovered metal-free perovskites exhibit advantages such as structural tunability and solution-processability, but they are disadvantaged by a lower coercive field compared to inorganic perovskites. Herein, we demonstrate that the coercive field (110 kV/cm) in metal-free ferroelectric perovskite MDABCO-NH₄-(PF₆)₃ (MDABCO = N-methyl-N'-diazabicyclo[2.2.2]octonium) is one order larger than MDABCO-NH₄-I₃ (12 kV/cm) owing to the stronger intermolecular hydrogen bonding in the former. Using isotope

SUBMITTER: Choi HS 

PROVIDER: S-EPMC8831526 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature