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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Detail(s)
Original language | English |
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Article number | 232903 |
Journal / Publication | Applied Physics Letters |
Volume | 117 |
Issue number | 23 |
Online published | 10 Dec 2020 |
Publication status | Published - Dec 2020 |
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DOI | DOI |
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Attachment(s) | Documents
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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
Citation Format(s)
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.
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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