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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.34: Poster

Montag, 1. April 2019, 17:30–19:30, Poster B1

Structure and morphology in tetracene-C60 blends — •Katja Schick, Clemens Zeiser, and Katharina Broch — Institut für Angewandte Physik, Universität Tübingen, Deutschland

Although C60 is one of the classical acceptors in organic solar cells [1], the mechanisms of its structure formation in blends are not fully understood. However, since the mixing behaviour or the length scales of phase separation are affecting device performance [2], an understanding of the underlying mechanisms is important. Phase separating systems can exhibit interesting kinetic effects as demonstrated, e.g. in blends of C60 and diindenoperylene (DIP), for which a thickness-dependent domain size has been observed [3].

In order to study how the length of the co-evaporated molecule influences the thickness-dependent phase separation and island size, we use tetracene (TET) which is shorter than DIP. To analyse the thickness-dependent structure and morphology of the TET:C60 films we use X-ray diffraction, AFM and SEM and discuss our findings in view of the steric compatibility of the two molecules.

[1] N. Martín et al. Chemical Review. 98(1998)

[2] S. Oosterhout et al. Nature Materials. 8(2009)

[3] R. Banerjee et al. Physical Review Letters. 110(2013)