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Issue 51, 2018, Issue in Progress
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Temperature dependence of piezo- and ferroelectricity in ultrathin P(VDF–TrFE) films

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Abstract

The polymer poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF–TrFE)) is highly desirable for piezoelectric and ferroelectric functional applications owing to its considerable electromechanical activity and reliable electrical polarization. However, a clear understanding of the effect of the thermal annealing on the electromechanical behavior and polarization nature of ultrathin crystalline P(VDF–TrFE) films is severely lacking. Here we report the thermally induced structural reorganization, and piezo- and ferroelectric features in the ultrathin P(VDF–TrFE) films. On applying a 40 °C annealing treatment, the polarization-patterned electrostrictive strain reaches the highest value of ∼53.7 pm. Besides, the ultrathin film exhibits a highly ordered antiparallel dipole alignment, the highest local piezoelectric activity, and an improved polarization relaxation time. The optimum film properties are achieved owing to a high degree of polymer chains oriented parallel to the substrate plane. Our results can reveal a promising avenue for nano-electro-mechanical and nano-ferroelectric electronic applications using ultrathin P(VDF–TrFE) films.

Graphical abstract: Temperature dependence of piezo- and ferroelectricity in ultrathin P(VDF–TrFE) films

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Supplementary files

Article information


Submitted
02 Jul 2018
Accepted
12 Aug 2018
First published
16 Aug 2018

This article is Open Access

RSC Adv., 2018,8, 29164-29171
Article type
Paper

Temperature dependence of piezo- and ferroelectricity in ultrathin P(VDF–TrFE) films

J. Qian, S. Jiang, Q. Wang, C. Yang, Y. Duan, H. Wang, J. Guo, Y. Shi and Y. Li, RSC Adv., 2018, 8, 29164
DOI: 10.1039/C8RA05648J

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