Temperature dependence of piezo- and ferroelectricity in ultrathin P(VDF–TrFE) films
作者： Jun Qian , Sai Jiang , Qijing Wang , Chengdong Yang , Yiwei Duan
DOI: 10.1039/C8RA05648J
关键词: Piezoelectricity 、 Polymer 、 Electrostriction 、 Materials science 、 Ferroelectricity 、 Annealing (metallurgy) 、 Optoelectronics 、 Dipole
摘要: 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 reliable electrical polarization. However, a clear understanding of the effect thermal annealing on behavior polarization nature ultrathin crystalline P(VDF–TrFE) films severely lacking. Here we report thermally induced structural reorganization, piezo- features in films. On applying 40 °C treatment, polarization-patterned electrostrictive strain reaches highest value ∼53.7 pm. Besides, film exhibits ordered antiparallel dipole alignment, local activity, an improved relaxation time. optimum properties are achieved high degree chains oriented parallel substrate plane. Our results can reveal promising avenue nano-electro-mechanical nano-ferroelectric electronic using
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