2007
DOI: 10.1063/1.2734370
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Influence of molecular structure and microstructure on device performance of polycrystalline pentacene thin-film transistors

Abstract: The authors have fabricated the pentacene thin films on polymethylmethacrylate ͑PMMA͒ and on silicon dioxide dielectric surfaces featuring similar surface energy and surface roughness. On both surfaces the pentacene films displayed high crystal quality from x-ray diffraction scans, although the film on PMMA had significantly smaller grain size. The pentacene transistors with PMMA exhibited excellent electrical characteristics, including high mobility of above 1.1 cm 2 / V s, on/off ratio above 10 6 , and sharp… Show more

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Cited by 45 publications
(29 citation statements)
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“…11 The carrier mobility for pentacene film is above 1 cm 2 /Vs, which is the highest value for any OFET with molecular films fabricated by thermal evaporation and high enough for simple electronic devices. 11 This means that numerous active carriers are present in the pentacene film (in this case, holes) to propagate the spin angular momentum. Moreover, pentacene shows photo-conductivity for visible light, 12 where the spin transport properties of 4 pentacene can be controlled through light irradiation.…”
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confidence: 94%
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“…11 The carrier mobility for pentacene film is above 1 cm 2 /Vs, which is the highest value for any OFET with molecular films fabricated by thermal evaporation and high enough for simple electronic devices. 11 This means that numerous active carriers are present in the pentacene film (in this case, holes) to propagate the spin angular momentum. Moreover, pentacene shows photo-conductivity for visible light, 12 where the spin transport properties of 4 pentacene can be controlled through light irradiation.…”
mentioning
confidence: 94%
“…Secondly, pentacene has good crystallinity, even in films formed by thermal evaporation, and shows relatively high electrical conductivity without any dopants. 11 Pentacene, which is a p-type semiconductor, is well known as an active-layer material in organic field-effect transistors (OFETs). 11 The carrier mobility for pentacene film is above 1 cm 2 /Vs, which is the highest value for any OFET with molecular films fabricated by thermal evaporation and high enough for simple electronic devices.…”
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confidence: 99%
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“…[4][5][6][7][8][9] We have focused on pentacene molecular films prepared by thermal evaporation as one candidate material for the spin transport, in terms of the good crystallinity even in the thermally evaporated films, and the high electrical conductivity without any dopants. 10 Moreover, pentacene shows the photo-conductivity for visible light, 11 where the spin transport properties of pentacene can be controlled through visible light irradiation. Recently, the spin transport in thermally evaporated pentacene films was achieved at room temperature (RT) with a pure spin current induced by spin-pumping, and the spin diffusion length (λ) in pentacene films was estimated to be about 42±10 nm.…”
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confidence: 99%
“…The frequencies of the two components are almost the same in the two films studied. The lower energy mode at ∼1177cm −1 =0.146eV is a symmetric (A g ) mode from in-plane bending of C-H bonds along the sides of pentacene molecules 10,19,20 (shown in the inset on the left of Fig. 2(a)).…”
Section: Analysis and Discussionmentioning
confidence: 99%