Dresden 2009 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 40: POSTERS Electronic and Optical Properties
CPP 40.16: Poster
Thursday, March 26, 2009, 17:00–19:30, P3
Intermolecular coupling in low polydispersity poly(3-hexylthiophene)s — •Christina Hacke1, Bianca Höfer1, Ruth Lohwasser2, Mukundan Thelakkat2, and Anna Köhler1 — 1Department of Physics, University of Bayreuth, 95440 Bayreuth, Germany — 2Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
The optical and electronic properties of regioregular poly(3-hexylthiophene) (P3HT) are of great interest for many applications in the field of organic semiconducting materials such as solar cells and field-effect transistors (OFETs). Recent research has highlighted the strong dependence of charge carrier mobility in the conformation of the P3HT backbone and the resulting intermolecular interactions. The formation of weakly interacting aggregates in P3HT depends strongly on molecular weight. Here we use P3HT with a very low polydispersity to study the molecular weight dependence in the formation of such aggregates. To assess the intermolecular interaction and the resulting morphology of the film, we use absorption measurements in solutions and films in combination with atomic force microscopy.