Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.68: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Organic Field-Effect Transistors based on Fluorene/thiophene Copolymers — •Frank Jaiser1, Dieter Neher1, Udom Asawapirom2, Ullrich Scherf2, and Henning Sirringhaus3 — 1Universität Potsdam, Experimentalphysik, Am Neuen Palais 10, 14469 Potsdam, Germany — 2Bergische Universität Wuppertal, Makromolekulare Chemie, Gaußstr. 20, 42097 Wuppertal, Germany — 3Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 OHE, UK
Organic field-effect transistors (OFETs) are promising elements in low-cost large-area electronics. Polymer-based OFETs can be prepared from solution. For applications, a sufficiently large charge carrier mobility and high on-off-ratios are required.
Even through polyfluorenes are now a well-studied class of polymers for application in organic light-emitting diodes [1], the large oxidation potential makes these materials unsuited for OFETs. Here, we present a detailed study of OFETs prepared from several fluorene/oligothiophene and fluorene/dithienylvinylene copolymers [2]. Several device configurations have been tested and modelled using common models for thin-film transistors. Further, the effect of annealing has been studied with respect to charge carrier mobility, on-off-ratio and onset voltage.
[1] D. Neher, Macromol. Rapid Comm. 22 (2001) 1365
[2] U. Asawapirom et al., Synthesis 2002, 1136