Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Original languageEnglish
Article number232903
Journal / PublicationApplied Physics Letters
Volume117
Issue number23
Online published10 Dec 2020
Publication statusPublished - Dec 2020

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Publisher's Copyright Statement
  • COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in S. Nayak, Ho Tin Ng, and A. Pramanick , "Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films", Appl. Phys. Lett. 117, 232903 (2020) and may be found at https://doi.org/10.1063/5.0010569.
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(bed2ba6c-5a79-477c-9438-c1b5147ea7cd).html

Abstract

Modification of relaxor behavior and large enhancement in dielectric permittivity are demonstrated in a P(VDF-TrFE) ferroelectric polymer film by thermal annealing treatment. For coexisting normal ferroelectric and relaxor behavior in P(VDF-TrFE) (molar ratio: 45:55) films, the relative contribution from the relaxor component is increased when annealed at high temperature and subsequently quenched. A relative peak permittivity of ε′ ∼ 100 is obtained for an annealing temperature of T = 90 ºC, which is one of the highest reported so far among poly(vinylidene fluoride) copolymer and terpolymer films. Based on x-ray diffraction analysis, we attribute the changes in dielectric properties to a decrease in crystallite domain size and a consequent increase in the crystalline-amorphous interfacial area.

Research Area(s)

  • FERROELECTRIC BEHAVIOR, POLY(VINYLIDENE FLUORIDE), ENERGY DENSITY, PHASE, TRIFLUOROETHYLENE, POLARIZATION, POLYMERS, TRANSITION

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Publication fingerprints text

100
Film Material Science
100
Permittivity Material Science
100
Copolymer Material Science
66
Ferroelectric Mater... Material Science
33
Annealing Material Science
33
Dielectric Property Material Science
33
Polymer Films Material Science
33
Crystallite Material Science
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Citation Format(s)

[ RIS ] [ BibTeX ]
Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films. / Nayak, S.; Ng, Ho Tin; Pramanick, A.
In: Applied Physics Letters, Vol. 117, No. 23, 232903, 12.2020.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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