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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster: Organic Semiconductors

CPP 8.11: Poster

Montag, 14. März 2011, 17:30–19:30, P2

Effect of annealing processes on morphology of photoactive polymer layers for solar cell applications — •Weijia Wang, Matthias A. Ruderer, and Peter Müller-Buschbaum — TU München, Physik Department, LS Funkt. Mat., James-Franck-Str. 1, 85748 Garching, Germany

The interest in photoactive polymers and its applications in organic photovoltaics increased in the last decades dramatically. The promise of these materials for production of mechanical stable, light weight and easy processible organic solar cells at low cost make them especially interesting. Currently the major drawback is still the low efficiencies compared to standard inorganic solar cells and the short lifetime. It was found that morphology plays an important role in both areas. Therefore the importance of structure control is crucial. We investigated the influence of different control parameters such as annealing and blending ratio on a bulk heterojunction systems based on a polythiophene derivative. The changes in structure were monitored with imaging methods such as AFM. The effect on molecular level is investigated by absorption and photoluminescence measurements.