The Intrinsic Coercive Field for P(VDF-TrFE) Thin-Films with Different Thicknesses

Abstract

Generally, the organic ferroelectric P(VDF-TrFE) thin film is partially crystallized with a mixture of ferroelectric crystallites, non-crystalline molecules, and additional non-ferroelectric crystallites, e.g., Trifluoroethylene, in the copolymers. Therefore, it is almost impossible for the domains to switch under a normal field without incurring of charge injection across these non-ferroelectric phases. In this paper, we use an equivalent-circuit description of the film consisting of a non-ferroelectric layer in series with a ferroelectric layer. Based on the polynomial fitting of polarization switching/non-switching results, we extract the intrinsic coercive field across the ferroelectric layer in the films with different thicknesses.

Keywords:

• Pacs Numbers: 77.22.Ej
• 77.80.Fm
• 77.55.+f

Keywords:

• Index Terms: Intrinsic coercive field
• P(VDF-TrFE) thin-film

Acknowledgments

This work was funded by Shanghai Key Program (grant 1052nm07600) and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai.