Deswal, Swati, Panday, Rishukumar, Naphade, Dipti R, Cazade, Pierre-Andre, Guerin, Sarah, Zareba, Jan K, Steiner, Alexander 
ORCID: 0000-0002-4315-6123, Ogale, Satishchandra, Anthopoulos, Thomas D and Boomishankar, Ramamoorthy
(2023)
Design and Piezoelectric Energy Harvesting Properties of a Ferroelectric Cyclophosphazene Salt.
SMALL, 19 (46).
e2300792-.
Abstract
Cyclophosphazenes offer a robust and easily modifiable platform for a diverse range of functional systems that have found applications in a wide variety of areas. Herein, for the first time, it reports an organophosphazene-based supramolecular ferroelectric [(PhCH<sub>2</sub> NH)<sub>6</sub> P<sub>3</sub> N<sub>3</sub> Me]I, [PMe]I. The compound crystallizes in the polar space group Pc and its thin-film sample exhibits remnant polarization of 5 µC cm<sup>-2</sup> . Vector piezoresponse force microscopy (PFM) measurements indicated the presence of multiaxial polarization. Subsequently, flexible composites of [PMe]I are fabricated for piezoelectric energy harvesting applications using thermoplastic polyurethane (TPU) as the matrix. The highest open-circuit voltages of 13.7 V and the maximum power density of 34.60 µW cm<sup>-2</sup> are recorded for the poled 20 wt.% [PMe]I/TPU device. To understand the molecular origins of the high performance of [PMe]I-based mechanical energy harvesting devices, piezoelectric charge tensor values are obtained from DFT calculations of the single crystal structure. These indicate that the mechanical stress-induced distortions in the [PMe]I crystals are facilitated by the high flexibility of the layered supramolecular assembly.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | cyclophosphazene, energy harvester, ferroelectric, piezoelectric, piezoresponse force microscopy |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 15 Sep 2023 07:10 |
| Last Modified: | 27 Nov 2023 09:51 |
| DOI: | 10.1002/smll.202300792 |
| Open Access URL: | https://onlinelibrary.wiley.com/doi/full/10.1002/s... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3172768 |
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