Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 28: Poster III

CPP 28.29: Poster

Mittwoch, 20. März 2024, 11:30–13:30, Poster C

Spark Discharge Doping - Unprecedented Aggregation Control in P3HT Solutions, Films and Blends — •Fabian Eller and Eva M. Herzig — Dynamik und Strukturbildung - Herzig Group, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany

We introduce a novel solution treatment utilizing spark discharges to enable a highly controlled aggregation of poly(3-hexylthiophene) (P3HT) in solution.[1] By choosing appropriate parameters of this current-induced doping treatment we demonstrate the fine tunability of the aggregate fraction and the quality of the polymer backbone order over exceptionally broad ranges.

When films are processed from highly ordered solutions, the high aggregate quality transfers to the films, which enables a strongly increased hole mobility. The aggregation control of the film formation is especially relevant to overcome the aggregation supression in highly miscible blends, e.g. with Y-series non-fullerene acceptors (NFAs).

[1] F. Eller et al, Small. 19, 2207537, 1613-6810 (2023).

Keywords: solution pre-aggregation; nanostructural control; non-fullerene acceptors (NFAs); miscibility; solubility