Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 19, Issue 15, Pages 2486-2494Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200900366
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Funding
- EU [212311]
- Marie Curie RTN THREADMILL [MRTN-CT-2006-036040]
- EST-SUPER [MEST-CT-2004-008128]
- International Center for Frontier Research in Chemistry (FRC, Strasbourg)
- FP6-Research Infrastructures (ARI) [026029 (MC2ACCESS)]
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Molecular dyads based on polycyclic electron donar (D) and electron acceptor (A) units represents suitable building blocks for forming highly ordered, solution-processable, nanosegregated D-A domains for potential use in (opto)electronic applications. A new dyad, based on alkyl substituted hexa-peri-hexabenzocoronene (HBC) and perylene monoimide (PMI) separated by an ethinylene linker, is shown to have a high tendency to self-assemble into ordered supramolecular arrangements at multiple length scales: macroscopic extruded filaments display long-range crystalline order, nanofiber networks are produced by simple spin-coating, and monolayers with a lamellar packing are formed by physisorption at the solution-HOPG interface. Moreover, highly uniform mesoscopic ribbons bearing atomically flat facets and steps with single-molecule heights self-assemble upon solvent-vapor annealing. Electrical measurements of HBC-PMI films and mesoscopic ribbons in a transistor configuration exhibit ambipolar transport with well balanced p- and n-type mobilities. Owing to the increased level of order at the supramolecular level, devices based on ribbons show mobility increases of more than one order of magnitude.
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