Polarization fatigue in poly(vinylidene fluoride (78%)-trifluoroethylene (22%)) ferroelectric thin films: a pulse train study |
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| Authors: | Luo Xiao-Y Zhang Ji-Hao Yan Xue-Jian and Zhu Guo-Dong |
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| Affiliation: | Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433, China |
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| Abstract: | This paper investigates the influences of polarization fatigue on remanent polarization and switching time by pulse train measurements in ferroelectric poly(vinylidene fluoride (78%) and trifluoroethylene (22%)) thin films. Fatigue was carried out by a series of bipolar switching pulses with constant pulse width (on-time) and various interval times between pulses (off-time). The experimental observations indicated that the off-time period showed no obvious influence on fatigue rate and the switching time increased with the increase of fatigue cycles. The origination of these phenomena was discussed according to the charge injection model. |
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| Keywords: | ferroelectric polymer polarization fatigue switching time charge transfer |
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