Hamburg 2009 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 13: Molekülphysik Poster 1

MO 13.1: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 8 Foyer

The impact of geometry on the fluorescence kinetics of poly(perylene bisimide acrylate) — •Florian Spreitler¹, Michael Sommer², Mukundan Thelakkat², and Jürgen Köhler¹ — ¹Experimentalphysik IV and BIMF, Universität Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany — ²Angewandte Funktionspolymere, Makromolekulare Chemie I, Universität Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany

Poly(perylene bisimide acrylate) is a novel electron conducting polymer with potential applications in organic photovoltaics and organic field effect transistors. Its steady-state absorption and fluorescence spectra feature considerable differences with respect to the monomer spectra. These are attributed to the aggregation of the perylene bisimide pendant groups.

Here we report on time-resolved ensemble fluorescence experiments on solutions of poly(perylene bisimide acrylate) as a function of chain length. We used a steak-camera setup to monitor spectrally resolved fluorescence decays on timescales between 1 ps and 100 ns. An insight into the geometry of the polymer is obtained by comparing our results with the predictions of the Frenkel exciton theory for different arrangements of the chromophore groups.