We examine the role of solvents in the performance of pentacene devices using the ferroelectric copolymer poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFe) as a gate insulating layer. High dipole moment solvents, such as dimethyl sulfoxide (DMSO), used to dissolve the copolymer for spincasting, increase the charge carrier mobility in field-effect transistors by nearly an order of magnitude as compared to lower dipole moment solvents. The polarization in Al/PVDF-TrFe/Au metal-ferroelectric-metal devices is also investigated. An increase in remnant polarization of ∼20% is observed in the sample using DMSO as the ferroelectric solvent. The DMSO based sample shows a hysteresis in its displacement curve even at the lowest measured voltage, indicating that the dipoles in the copolymer are more ordered initially.
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9 June 2014
Research Article|
June 09 2014
Enhanced performance of ferroelectric-based all organic capacitors and transistors through choice of solvent
G. Knotts;
G. Knotts
1Department of Physics and Astronomy,
University of Missouri
, Columbia, Missouri 65211, USA
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A. Bhaumik;
A. Bhaumik
2Department of Physics, Astronomy, and Materials Science,
Missouri State University
, Springfield, Missouri 65897, USA
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K. Ghosh;
K. Ghosh
2Department of Physics, Astronomy, and Materials Science,
Missouri State University
, Springfield, Missouri 65897, USA
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
Appl. Phys. Lett. 104, 233301 (2014)
Article history
Received:
March 13 2014
Accepted:
May 15 2014
Citation
G. Knotts, A. Bhaumik, K. Ghosh, S. Guha; Enhanced performance of ferroelectric-based all organic capacitors and transistors through choice of solvent. Appl. Phys. Lett. 9 June 2014; 104 (23): 233301. https://doi.org/10.1063/1.4880119
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