Field-effect transistors based on self-organized molecular nanostripes

M. Cavallini, P. Stoliare, J.-F. Moulin, M. Surin, P. Leclère, R. Lazzaroni, Dag Werner Breiby, Jens Wenzel Andreasen, Martin Meedom Nielsen, P. Sonar, A.C. Grimsdale, K. Müllen, F. Biscarini

Research output: Contribution to journalJournal articleResearchpeer-review


Charge transport properties in organic semiconductors depend strongly on molecular order. Here we demonstrate field-effect transistors where drain current flows through a precisely defined array of nanostripes made of crystalline and highly ordered molecules. The molecular stripes are fabricated across the channel of the transistor by a stamp-assisted deposition of the molecular semiconductors from a solution. As the solvent evaporates, the capillary forces drive the solution to form menisci under the stamp protrusions. The solute precipitates only in the regions where the solution is confined by the menisci once the critical concentration is reached and self-organizes into molecularly ordered stripes 100-200 nm wide and a few monolayers high. The charge mobility measured along the stripes is 2 orders of magnitude larger than the values measured for spin-coated thin films.
Original languageEnglish
JournalNano Letters
Issue number12
Pages (from-to)2422-2425
Publication statusPublished - 2005


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