http://www.cnr.it/ontology/cnr/individuo/prodotto/ID72008
Charge injection across self-assembly monolayers in organic field-effect transistors: Odd-even effects (Articolo in rivista)
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- Charge injection across self-assembly monolayers in organic field-effect transistors: Odd-even effects (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/ja069235m (literal)
- Alternative label
Stoliar, Pablo (1); Kshirsagar, Rajendra (1); Massi, Massimiliano (1); Annibale, Paolo (1); Albonetti, Cristiano (1); De Leeuw, Dago M. (2); Biscarini, Fabio (1) (2007)
Charge injection across self-assembly monolayers in organic field-effect transistors: Odd-even effects
in Journal of the American Chemical Society (Print); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Stoliar, Pablo (1); Kshirsagar, Rajendra (1); Massi, Massimiliano (1); Annibale, Paolo (1); Albonetti, Cristiano (1); De Leeuw, Dago M. (2); Biscarini, Fabio (1) (literal)
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- ISI Web of Science (WOS) (literal)
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- (1) Nanotechnology of Multifunctional Materials (NMM) Research DiVision, CNR-ISMN, Via Gobetti 101, I-40129 Bologna, Italy
(2) Philips Research Laboratories, High Tech Campus 4, NL-5656 AA, EindhoVen, The Netherlands (literal)
- Titolo
- Charge injection across self-assembly monolayers in organic field-effect transistors: Odd-even effects (literal)
- Abstract
- We investigate the role of self-assembly monolayers in modulating the response of organic field-effect transistors. Alkanethiol monolayers of chain length n are self-assembled on the source and drain electrodes of pentacene field-effect transistors. The charge carrier mobility mu exhibits large fluctuations correlated with odd-even n. For n < 8, mu increases by 1 order of magnitude owing to the decrease of the hole injection barrier and the improved molecular order at the organic-metallic interface. For n >= 8, mu decays exponentially with an inverse decay length beta = 0.6 A(-1). Our results show that (i) charge injection across the interface occurs by through-bond tunneling of holes mediated by the alkanethiol layer; (ii) in the long-chain regime, the charge injection across the alkanethiol monolayer completely governs the transistor response; (iii) the transistor is a sensitive gauge for probing charge transport across single monolayers. The odd-even effect is ascribed to the anisotropic coupling between the alkanethiol terminal sigma bond and the HOMO level of ordered pentacene molecules. (literal)
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