Enhanced performance of AlOx-based organic thin-film transistors
Research output: Contribution to conference › Paper
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2011. 61-66 Paper presented at Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference, Portland OR., 15-18 August, 2011.
Research output: Contribution to conference › Paper
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T1 - Enhanced performance of AlOx-based organic thin-film transistors
AU - Ashall, D.T.
AU - Ashall, D.
AU - Fakher, S.J.
AU - Mabrook, M.F.
PY - 2011/8/15
Y1 - 2011/8/15
N2 - The performance of thin-film transistors based on an aluminum oxide gate dielectric and a pentacene semiconductor have been systematically enhanced by modification of the oxide surface. The oxide layer was formed at room temperature using a standard anodization technique. The effects of surface modification of the oxide layer on device performance have been investigated. Higher mobility transistors were fabricated by passivating the oxide layer with a self-assembled molecular monolayer of an alkyl phosphonic acid or a spin-coated acrylic film. In both cases the normalized sub-threshold swing was reduced by a factor of 1.9 and 1.5, and the maximum charge-carrier mobility was increased by one and two orders of magnitudes respectively. The much increased mobility for transistors modified by a thin film of polymethylmethacrylate (PMMA) is attributed to the larger pentacene grain size.
AB - The performance of thin-film transistors based on an aluminum oxide gate dielectric and a pentacene semiconductor have been systematically enhanced by modification of the oxide surface. The oxide layer was formed at room temperature using a standard anodization technique. The effects of surface modification of the oxide layer on device performance have been investigated. Higher mobility transistors were fabricated by passivating the oxide layer with a self-assembled molecular monolayer of an alkyl phosphonic acid or a spin-coated acrylic film. In both cases the normalized sub-threshold swing was reduced by a factor of 1.9 and 1.5, and the maximum charge-carrier mobility was increased by one and two orders of magnitudes respectively. The much increased mobility for transistors modified by a thin film of polymethylmethacrylate (PMMA) is attributed to the larger pentacene grain size.
U2 - 10.1109/NANO.2011.6144540
DO - 10.1109/NANO.2011.6144540
M3 - Paper
SP - 61
EP - 66
T2 - Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference, Portland OR., 15-18 August, 2011
Y2 - 3 January 0001
ER -