Polarization Mechanisms in P(VDF-TrFE) Ferroelectric Thin Films

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Andrew C. Choi
  • Scott T. Misture
  • Alisa R. Paterson
  • Jacob L. Jones
  • Olaf C. Borkiewicz

Detail(s)

Original languageEnglish
Article number1800340
Journal / PublicationPhysica Status Solidi - Rapid Research Letters
Volume12
Issue number10
Online published31 Aug 2018
Publication statusPublished - Oct 2018

Abstract

Ferroelectric polymers have gained tremendous attention due to several attractive properties including high breakdown strength, low dielectric loss, relatively fast charge/discharge rates and greater flexibility than their ceramic counterparts. In order to achieve enhanced energy efficiency in high-energy storage capacitor applications, it is desirable to obtain slim polarization hysteresis loops for ferroelectric polymer films. Here, it has been demonstrated that promotion of large crystallites and γ phase content through thermal annealing provides a cost-effective way to obtain a quasi-linear polarization response in a PVDF co-polymer thin film. The polarization mechanisms underlying a thin hysteresis loop in the thermally annealed film are elucidated using direct experimental insights from in situ synchrotron diffraction with two-dimensional detection. It has been demonstrated that the susceptibility for electric-field-induced structural changes is higher in the defective ferroelectric phase γ than the polar phase β, due to a higher flexibility for accommodation of gauche bond along the carbon chain. In addition, the polymer chains in the γ phase also exhibit a range of different responses depending on their orientations with respect to the electric field. These results are broadly significant as they provide a fundamental basis for rational design of phase assemblages to obtain tailor-made properties in ferroelectric polymer films.

Research Area(s)

  • ferroelectrics, microstructural design, polarization response, polymers, thin films

Citation Format(s)

Polarization Mechanisms in P(VDF-TrFE) Ferroelectric Thin Films. / Choi, Andrew C.; Pramanick, Abhijit; Misture, Scott T.; Paterson, Alisa R.; Jones, Jacob L.; Borkiewicz, Olaf C.; Ren, Yang.

In: Physica Status Solidi - Rapid Research Letters, Vol. 12, No. 10, 1800340, 10.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review