Enhanced functional and structural characteristics of poly(vinylidene-trifluoroethylene) copolymer thin films by corona poling
- Nguyen, Chien A.
- Mhaisalkar, Subodh G.
- Yee, Wu Aik
- Lee, Pooi See
- Lu, Xuehong
- Srinivasan, Madhavi
DOIAbstract
Electrical poling is of much interest for the enhancement of polarization properties of ferroelectric materials such as poly(vinylidene-trifluoroethylene) [P(VDF-TrFE)] in applications ranging from memory devices to piezoelectric actuation. Here, we report the changes in dielectric and optical properties correlated with structural modification of P(VDF-TrFE) thin films (<1 μm thickness) subjected to corona poling at low voltages (6 kV) under various thermal conditions. Enhanced crystallinity of hot-poled samples was observed independent of thermal history and crystalline structure, indicating the absence of recrystallization during poling. Absorption measurements confirmed the ordered structure in hot-poled samples due to the permanent...
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