A Flexible Composite Mechanical Energy Harvester from a Ferroelectric Organoamino Phosphonium Salt

Angewandte Chemie
Thangavel VijayakanthRamamoorthy Boomishankar

Abstract

A new binary organic salt diphenyl diisopropylamino phosphonium hexaflurophosphate (DPDP⋅PF6 ) was shown to exhibit a good ferroelectric response and employed for mechanical energy harvesting application. The phosphonium salt crystallizes in the monoclinic noncentrosymmetric space group Cc and exhibits an H-bonded 1D chain structure due to N-H⋅⋅⋅F interactions. Ferroelectric measurements on the single crystals of DPDP⋅PF6 gave a well-saturated rectangular hysteresis loop with a remnant (Pr ) polarization value of 6 μC cm-2 . Further, composite devices based on polydimethylsiloxane (PDMS) films for various weight percentages (3, 5, 7, 10 and 20 wt %) of DPDP⋅PF6 were prepared and examined for power generation by using an impact test setup. A maximum output peak-to-peak voltage (VPP ) of 8.5 V and an output peak-to-peak current (IPP ) of 0.5 μA was obtained for the non-poled composite film with 10 wt % of DPDP⋅PF6 . These results show the efficacy of organic ferroelectric substances as potential micropower generators.

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Citations

Mar 7, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Thangavel VijayakanthRamamoorthy Boomishankar
Mar 25, 2020·Angewandte Chemie·Thangavel VijayakanthRamamoorthy Boomishankar
Aug 11, 2020·Chemistry, an Asian Journal·Neetu PrajeshRamamoorthy Boomishankar

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