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Journal of the Korean Physical Society

, Volume 74, Issue 1, pp 78–81 | Cite as

Dielectric and Ferroelectric Properties of P(VDF-TrFE) Films with Different Polar Solvents

  • Dae Sol Kong
  • Tae Kwon Lee
  • Young Joon Ko
  • Jong Hoon JungEmail author
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Abstract

We investigated the structural, dielectric, and ferroelectric properties of poly(vinylidenefluorideco-trifluoroethylene) [P(VDF-TrFE)] films that were grown using dimethylformamide (DMF) and tetrahydrofuran (THF) polar solvents. The DMF solvent has a large dipole moment with a long bond length and evaporates slowly while the THF solvent has a small dipole moment with a short bond length and evaporates rapidly. Because of these differences, a thin film with a rough surface occurs when using DMF while a thick film with a smooth surface is formed when using THF. Compared to DMF solvent, the ferroelectric polarization is not well saturated and the dielectric constant is quite low for the THF solvent, which is possibly due to the residual paraelectric defects in the P(VDF-TrFE) films. For both solvents, the polarization switching can be explained by using the Kolmogorov-Avrami-Ishibashi (KAI) model with similar switching times. Both solvents enable the P(VDF-TrFE) films to have good retention and fatigue resistance for ferroelectric polarization.

Keywords

Polar solvents P(VDF-TrFE) Ferroelectric switching Retention Fatigue resistance 

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Copyright information

© The Korean Physical Society 2019

Authors and Affiliations

  • Dae Sol Kong
    • 1
  • Tae Kwon Lee
    • 1
  • Young Joon Ko
    • 1
  • Jong Hoon Jung
    • 1
    Email author
  1. 1.Department of PhysicsInha UniversityIncheonKorea

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