Regensburg 2019 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.35: Poster

Monday, April 1, 2019, 17:30–19:30, Poster B1

Structural and optical properties of pentacene and tetracene blends — •Daniel Lepple, Clemens Zeiser, and Katharina Broch — Universität Tübingen

Optoelectronic devices based on organic semiconductors (OSCs) have found industrial applications, e.g. as light-weight and flexible displays [1]. In many devices, the active layer is composed of mixtures of two OSCs where one acts as a donor and the other one as an acceptor. As the device performance is strongly affected by the structural and optical properties of the mixed film, an understanding of structure-property relations is not only interesting from the viewpoint of fundamental research but also important for further device optimization. A prototypical class of OSCs to study the processes of structure formation and their impact on photophysical properties are acenes, especially tetracene and pentacene [2]. Although their properties have been studied extensively, there remain open questions due to the complex photophysics of these two molecules [3]. Here, we report on the structural and steady-state optical properties of blends of tetracene and pentacene, which we use as a model system for the study of structure-property relations in weakly interacting, structually compatible systems.

[1] J. H. Koo et al. Adv Funct. Mater. 28 (2018)

[2] J. Anthony et al. Chemical Review. 106 (2006)

[3] D. Beljonne et al. Physical Review Letter. 110 (2013)