Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films
Related Research Unit(s)
|Journal / Publication||Applied Physics Letters|
|Online published||10 Dec 2020|
|Publication status||Published - Dec 2020|
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.
- FERROELECTRIC BEHAVIOR, POLY(VINYLIDENE FLUORIDE), ENERGY DENSITY, PHASE, TRIFLUOROETHYLENE, POLARIZATION, POLYMERS, TRANSITION
Applied Physics Letters, Vol. 117, No. 23, 232903, 12.2020.
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Nayak, S, Ng, HT & Pramanick, A 2020, 'Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films', Applied Physics Letters, vol. 117, no. 23, 232903. https://doi.org/10.1063/5.0010569
Nayak, S., Ng, H. T., & Pramanick, A. (2020). Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films. Applied Physics Letters, 117(23), . https://doi.org/10.1063/5.0010569
Nayak S, Ng HT, Pramanick A. Enhanced dielectric permittivity and relaxor behavior in thermally annealed P(VDF-TrFE) copolymer films. Applied Physics Letters. 2020 Dec;117(23). 232903. https://doi.org/10.1063/5.0010569