Electron emission from ferroelectric copolymer thin films of vinylidene fluoride and trifluoroethylene
Electron emission from ferroelectric copolymer thin films consisting of vinylidene fluoride and trifluoroethylene (PVDF-TrFE) are reported. The ∼ 3 μ m thick copolymer thin films were deposited by spin coating and were then annealed to improve their crystallinity. The as-annealed films exhibited an...
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Veröffentlicht in: | Applied physics letters 2006-11, Vol.89 (22), p.222907-222907-3 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | Electron emission from ferroelectric copolymer thin films consisting of vinylidene fluoride and trifluoroethylene (PVDF-TrFE) are reported. The
∼
3
μ
m
thick copolymer thin films were deposited by spin coating and were then annealed to improve their crystallinity. The as-annealed films exhibited an electron emission capability, as anticipated; an emission charge within the range from
122
to
308
pC
∕
cycle
occurs at a positive excitation voltage with different excitation frequencies. It was found that the electron emission process of the PVDF-TrFE thin films differs from the conventional ferroelectric electron emission. A possible emission mechanism is proposed, which suggests that an amorphous phase in the polymer films plays an important role in trapping and emitting electrons. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2388874 |