Formation of Nanocrystalline Copolymer Thin Film PVDF-TrFE and Its Ferroelectric Electron Emission Property
Ferroelectric copolymer thin film PVDF-TrFE was deposited by spin coating method, and then annealed for the improved crystallization. The XRD and AFM measurements showed that as-formed PVDF-TrFE thin film was composed of the nanocrystallines with 50∼80 nm in size and some amorphous phases. Meanwhile, as-formed PVDF-TrFE thin films also show a good polarization inversion property with a switch current of ∼2.0 μA at a coercive field 40 MV/m. Electron emission testing results showed that under a continuous excitation of applied voltage pulses, PVDF-TrFE thin films exhibited an expected electron emission ability with emission current range of 0.08∼0.52 μA, and the related electron emission mechanism was discussed.
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Document Type: Research Article
Publication date: February 1, 2009
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