The role of space charges on polarization fatigue in ferroelectric P(VDF-TrFE) copolymer films

Author

Zhu, Guodong ; Luo, XiaoYa ; Zhang, JiHao ; Zeng, ZhiGang ; Yan, XueJian

Author_Institution

Dept. of Mater. Sci., Fudan Univ., Shanghai

fYear

2008

fDate

15-17 Sept. 2008

Abstract

Recently, in our lab we have performed some systemic studies on polarization fatigue in ferroelectric polymers and four possible contributing factors (applied voltages, operation temperature, film crystallinity and electrode structure) are characterized by a homemade sawyer-Tower circuit. All fatigue phenomena observed in these experiments seem to imply the effect of space charges, which are injected from electrodes into ferroelectrics and trapped at the boundaries of crystallites or/and by defects. We believe that the interaction between trapped charges and electric dipoles in ferroelectrics has inhibited ferroelectric switching in polymers and induced the occurrence of polarization fatigue.

Keywords

crystallites; ferroelectric thin films; polarisation; polymer blends; polymer films; space charge; P(VDF-TrFE) copolymer films; crystallites; defects; electrodes; ferroelectric films; homemade sawyer-Tower circuit; polarization fatigue; space charge; Crystallization; Electrodes; Fatigue; Ferroelectric films; Ferroelectric materials; Polarization; Polymer films; Space charge; Temperature; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2008. ISE-13. 13th International Symposium on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-1850-3

Electronic_ISBN

978-1-4244-1851-0

Type

conf

DOI

10.1109/ISE.2008.4814046

Filename

4814046