Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: Poster: Organic Electronics and Photovoltaics
CPP 30.1: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster B2
Microstructure of donor-acceptor conjugated polymer blends and annealing induced nano-aggregation observed by two-dimensional polarization fluorescence microscopy — •Daniela Täuber1, Yuxi Tian1, Yuxin Xia2, Olle Inganäs2, and Ivan Scheblykin1 — 1Chemical Physics, Lund University, Lund, Sweden — 2Biomolecular and Organic Electronics, Linköping University, Linköping, Sweden
Polymer-polymer bulk heterojunction solar cell devices combine solar energy harvesting with the fortune of polymer materials, which enable easy and inexpensive processing and flexibility of the material.
Their performance crucially depends on the organization of the conjugated polymer molecules. Studying blends of TQ1 and N2200 spin-cast from solution with two-dimensional polarization fluorescence microscopy we observe concentration dependent microstructures. Comparing polarization parameters from films as prepared with films annealed at 120°C, we find modifications pointing to enhanced nano-aggregation of the annealed polymer blend. These changes agree with modifications seen in fluorescence and absorption spectra and in fluorescence lifetime measurements.
D.T. acknowledges a personal research grant DFG-TA 1049/1-1.