Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Organic Electronics and Photovoltaics II - Non-Fullerene Organic Solar Cells
CPP 31.4: Vortrag
Mittwoch, 3. April 2019, 10:15–10:30, H18
Fullerene-free bulk heterojunction blends for photovoltaic applications - a morphological study — •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
In the last decades, organic electronics have been in the focus of research due to their advantageous properties, such as versatility, flexibility, low-cost manufacturing processes, like roll-to-roll printing or spray casting, and the tunable characteristics. These properties open up a wide range of applications and represent a promising alternative for the conventional inorganic photovoltaics. Even though the power conversion efficiency is lower than the ones of conventional devices, values of over 11% have been reported. Thereby, systems using low-band gap polymers and non-fullerene small molecules have received increasing attention. We study the inner morphology of such a bulk heterojunction blend, namely PBDB-T and ITIC of different compositions with grazing-incidence small-angle X-ray scattering (GISAXS). The obtained structural information are correlated with current density-voltage characteristics and the absorbance of the active layer in order to improve the efficiency.