Dresden 2020 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 73: Organic Electronics and Photovoltaics II
CPP 73.3: Talk
Wednesday, March 18, 2020, 17:00–17:15, ZEU 260
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
In the last decades, the focus of research has been drawn towards the field of organic electronics due to their advantageous properties, such as versatility, flexibility, low-cost manufacturing processes, as well as their tuneable characteristics, such as solubility and absorption. These properties open up a wide range of applications, especially, in the field of photovoltaics. Hence, organic photovoltaics 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 10% have been reported and thus receive industrial attention for commercialization. We study the inner morphology of a low band gap, fullerene-free 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.