Dresden 2017 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations

CPP 50.15: Poster

Wednesday, March 22, 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.