Enhanced Functional and Structural Characteristics of Poly(vinylidene-trifluoroethylene) Copolymer Thin Films by Corona Poling
作者： Chien A Nguyen , Pooi See Lee , Wu Aik Yee , Xuehong Lu , Madhavi Srinivasan
DOI: 10.1149/1.2769269
关键词: Glass Poling 、 Crystallinity 、 Ferroelectricity 、 X-ray photoelectron spectroscopy 、 Materials science 、 Composite material 、 Dielectric 、 Poling 、 Thin film 、 Analytical chemistry 、 Corona poling
摘要: Electrical poling is of much interest for the enhancement polarization properties ferroelectric materials such as polyvinylidene-trifluoroethylenePVDF-TrFE in applications ranging from memory devices to piezoelectric actuation. Here, we report changes dielectric and optical correlated with structural modification PVDF-TrFE thin films 1 m thickness subjected corona at low voltages 6k V under various thermal conditions. Enhanced crystallinity hot-poled samples was observed independent history crystalline structure, indicating absence recrystallization during poling. Absorption measurements confirmed ordered structure due permanent orientation dipoles higher crystallinity, thus resulting increased long-retained capacitance PVDFTrFE capacitor device high frequency C-V characterization. X-ray photoelectron spectroscopy further shifting C F core orbitals binding energy related formation more phases by
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