Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster Session IV

CPP 46.34: Poster

Mittwoch, 14. März 2018, 11:00–13:00, Poster A

Morphological Investigations on fullerene-free bulk heterojunction blends for photovoltaic applications — •Sebastian Grott¹, Lorenz Biessmann¹, Nitin Saxena¹, Wei Cao¹, Sigrid Bernstorff², and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — ²Elettra-Sincrotrone Trieste, 34149 Basovizza, Italy

Organic solar cells have been in the focus of research for decades due to their advantages in versatility, flexibility, low-cost manufacturing processes, like roll-to-roll-printing, and the tuneable characteristics. These properties open up a wide field of applications and represent an alternative for conventional photovoltaics. Even though the power conversion efficiency is lower than the ones of conventional, values over 11% have been reported. In particular, fullerene-free bulk heterojunction (BHJ) blends receive an increasing attention. We investigate the inner morphology of such BHJ systems. Different compositions of PBDB-T and ITIC BHJ films are studied with advanced x-ray scattering techniques. The obtained structure information is correlated with current density-voltage characteristics and the absorbance of the active layers.