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Title: | Design and Piezoelectric Energy Harvesting Properties of a Ferroelectric Cyclophosphazene Salt |
Authors: | DESWAL, SWATI PANDAY, RISHUKUMAR Naphade, Dipti R. Cazade, Pierre-Andre Guerin, Sarah Zareba, Jan K. Steiner, Alexander OGALE, SATISHCHANDRA Anthopoulos, Thomas D. BOOMISHANKAR, RAMAMOORTHY Dept. of Chemistry Dept. of Physics |
Keywords: | Cyclophosphazene Energy harvester Ferroelectric Piezoelectric Piezoresponse force microscopy 2023-AUG-WEEK1 TOC-AUG-2023 2023 |
Issue Date: | Aug-2023 |
Publisher: | Wiley |
Citation: | Small. |
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 [(PhCH2NH)6P3N3Me]I, [PMe]I. The compound crystallizes in the polar space group Pc and its thin-film sample exhibits remnant polarization of 5 µC cm−2. 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−2 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. |
URI: | https://doi.org/10.1002/smll.202300792 http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8122 |
ISSN: | 1613-6810 1613-6829 |
Appears in Collections: | JOURNAL ARTICLES |
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