Mechanical properties of the ferroelectric metal-free perovskite [MDABCO](NH4)I3

Michael G Ehrenreich; Zhixin Zeng; Stefan Burger; Mark R Warren; Michael W Gaultois; Jin-Chong Tan; Gregor Kieslich

doi:10.1039/c9cc00580c

Mechanical properties of the ferroelectric metal-free perovskite [MDABCO](NH₄)I₃

Chem Commun (Camb). 2019 Apr 7;55(27):3911-3914. doi: 10.1039/c9cc00580c. Epub 2019 Mar 14.

Authors

Michael G Ehrenreich¹, Zhixin Zeng², Stefan Burger¹, Mark R Warren³, Michael W Gaultois⁴, Jin-Chong Tan², Gregor Kieslich¹

Affiliations

¹ Department of Chemistry and Catalysis Research Center, Technical University of Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany. gregor.kieslich@tum.de.
² Multifunctional Materials & Composites (MMC) Laboratory, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK. jin-chong.tan@eng.ox.ac.uk.
³ Diamond Light Source, Diamond House, Harwell Science and Innovation Campus, OX11 ODE Oxfordshire, UK.
⁴ Leverhulme Research Centre of Functional Materials Design, The Materials Innovation Factory, Department of Chemistry, University of Liverpool, L3 3NY Liverpool, UK.

PMID: 30869699
DOI: 10.1039/c9cc00580c

Abstract

The metal-free hybrid organic-inorganic perovskite [MDABCO](NH₄)I₃ (with MDABCO = N-methyl-1,4-diazabicyclo[2.2.2]octane) was recently discovered to exhibit an excellent ferroelectric performance, challenging established ceramic ferroelectrics. We here probe the mechanical properties of [MDABCO](NH₄)I₃ by combining high pressure single crystal X-ray diffraction and nanoindentation, underlining the exceptional role and opportunities that come with the use of sustainable, metal-free perovskite ferroelectrics.