Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.35: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
Improvement of Organic Solar Cell Morphology and Device Operation due to Controlled Polymer Aggregation in Solution — •Shahidul Alam1,2, Rico Meitzner1,2, Christian Kästner3, Christoph Ulbricht4, Daniel A. M. Egbe4, Ulrich S. Schubert1,2, and Harald Hoppe1,2 — 1Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany — 2Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstrasse 10, 07743 Jena, Germany — 3Institute of Thermodynamics and Fluid Mechanics, Technische Universität Ilmenau, Am Helmholtzring 1, 98693 Ilmenau, Germany — 4Institute of Polymeric Materials and Testing, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria
Aggregation of organic semiconductors (OS) generally positively impacts the device performance of polymer solar cells. Aggregation and specifically intermolecular electronic coupling leads to extended absorption spectra by formation of new absorption bands. In addition, more ordered domains of OS improve the free charge carrier generation yield and also reduce recombination rates of free charges located in the ordered phases due to energy relaxation within. Thus, aggregation enhances charge carrier mobility and lifetime, resulting in an improved charge extraction under operating conditions. Here we report progress in controlling polymer aggregation in solution by introduction of anti-solvent additives. The impact of polymer aggregation on photovoltaic performance was investigated by various spectroscopic methods.