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Dec 8 – 10, 2020 Online only
Online event
Europe/Berlin timezone

Morphology of fullerene-free bulk heterojunction blends for photovoltaic applications

Dec 9, 2020, 2:30 PM
3h 30m
Online event

Online event


Sebastian Grott (TU München, Physik-Department, Lehrstuhl für Funktionelle Materialien)


Over the last decades, the focus of research has been shifted towards the field of organic electronics due to their advantageous properties, such as low-cost manufacturing processes, versatility, flexibility, as well as their tunable characteristics, such as absorption and solubility. 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 16% 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 is correlated with current density voltage characteristics and the absorbance of the active layer in order to improve the efficiency.

Primary authors

Sebastian Grott (TU München, Physik-Department, Lehrstuhl für Funktionelle Materialien) Lorenz Bießmann (TU München, Physik-Department E13) Nitin Saxena (Technische Universität München, Lehrstuhl für Funktionelle Materialien) Wei Cao (TU München) Sigrid Bernstorff (Elettra Sincrotrone Trieste S. C. p. A.) Peter Müller-Buschbaum (TU München, Physik-Department, LS Funktionelle Materialien)

Presentation materials