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Effect of Centrifugal Force on Power Output of a Spin-Coated Poly(Vinylidene Fluoride-Trifluoroethylene)-Based Piezoelectric Nanogenerator

Author

Listed:
  • Dong Geun Jeong

    (Department of Physics, Inha University, Incheon 22212, Republic of Korea)

  • Huidrom Hemojit Singh

    (Department of Physics, Inha University, Incheon 22212, Republic of Korea)

  • Mi Suk Kim

    (Department of Physics, Inha University, Incheon 22212, Republic of Korea)

  • Jong Hoon Jung

    (Department of Physics, Inha University, Incheon 22212, Republic of Korea)

Abstract

While poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) film is an excellent piezoelectric material for mechanical energy harvesting, the piezoelectric output varies considerably with the spin coating conditions. Herein, we reported a systematic evaluation of the structural, electrical, mechanical, and microstructural properties of spin-coated P(VDF-TrFE) films obtained at various distances from the center, as well as under different rotational speeds. With increasing distance, the remnant polarization, dielectric constant, and crystallinity of the films increased, which resulted in enhanced piezoelectric power at the largest distance. With increasing rotational speed, the remnant polarization, dielectric constant, and crystallinity of the films initially increased and then decreased, while the Young’s modulus continuously increased. This resulted in an enhanced piezoelectric power at a given rotational speed. The piezoelectric power is proportional to the remnant polarization and inversely proportional to the Young’s modulus. The highest (2.1 mW) and lowest (0.5 mW) instantaneous powers were obtained at the largest (1.09 μC/cm 2 ·GPa −1 ) and smallest (0.60 μC/cm 2 ·GPa −1 ) value of remnant polarization over Young’s modulus, respectively. We explain these behaviors in terms of the centrifugal force-induced shear stress and grain alignment, as well as the thickness-dependent β-phase crystallization and confinement. This work implies that the spin coating conditions of distance and rotational speed should be optimized for the enhanced power output of spin-coated P(VDF-TrFE)-based piezoelectric nanogenerators.

Suggested Citation

  • Dong Geun Jeong & Huidrom Hemojit Singh & Mi Suk Kim & Jong Hoon Jung, 2023. "Effect of Centrifugal Force on Power Output of a Spin-Coated Poly(Vinylidene Fluoride-Trifluoroethylene)-Based Piezoelectric Nanogenerator," Energies, MDPI, vol. 16(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1892-:d:1068232
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    References listed on IDEAS

    as
    1. E. Bellet-Amalric & J.F. Legrand, 1998. "Crystalline structures and phase transition of the ferroelectric P(VDF-TrFE) copolymers, a neutron diffraction study," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 3(2), pages 225-236, July.
    2. Areeba Naqvi & Ahsan Ali & Wael A. Altabey & Sallam A. Kouritem, 2022. "Energy Harvesting from Fluid Flow Using Piezoelectric Materials: A Review," Energies, MDPI, vol. 15(19), pages 1-35, October.
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