Dresden 2017 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations
CPP 50.15: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P3
Influence of sidechains on the aggregation behavior of polythiophenes — •Konstantin Schötz1, Tobias Meier1, Dominic Raithel2, Daniel Schiefer3, Michael Sommer3, Fabian Panzer1, Richard Hildner2, and Anna Köhler1 — 1Experimental Physics II, Universität Bayreuth — 2Experimental Physics IV, Universität Bayreuth — 3Department for Macromolecular Chemistry, Albert-Ludwigs-Universität Freiburg
Polythiophenes are known to often undergo a phase transition from a high energy coiled phase to a low energy aggregated phase upon cooling or spin coating. The properties of these aggregates have strong impact on the performance of devices like OFETs or solar-cells. It is known that these properties and the characteristics of the aggregate formation depend on different parameters like chain length, polydispersity or concentration of the solution. We measured temperature dependent absorption and emission on various polythiophenes that differ in their sidechain architecture. We show that the electronic structure and thus the character of the formed aggregates depend strongly on the type of the sidechains.