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.
| Original language | English |
|---|---|
| Article number | 232903 |
| Journal | Applied Physics Letters |
| Volume | 117 |
| Issue number | 23 |
| Online published | 10 Dec 2020 |
| DOIs | |
| Publication status | Published - Dec 2020 |
Research Keywords
- FERROELECTRIC BEHAVIOR
- POLY(VINYLIDENE FLUORIDE)
- ENERGY DENSITY
- PHASE
- TRIFLUOROETHYLENE
- POLARIZATION
- POLYMERS
- TRANSITION
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.