Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.36: Poster
Montag, 1. April 2019, 17:30–19:30, Poster B1
Optical Investigation of Charge Transfer States in Tetracene/F6-TCNNQ Blends — •Christoph Theurer1, Clemens Zeiser1, Nico Hofeditz2, Wolfram Heimbrodt2, Martin Koch2, and Katharina Broch1 — 1Eberhard Karls Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen — 2Philipps Universität Marburg, Physikalisches Institut, Renthof 5, Laborbau II, 35032 Marburg
Organic semiconductors have a huge potential for large area, cost and energy efficient optoelectronic devices like organic solar cells or OLED displays [1]. The majority of functional devices rely on charge transfer interactions between acceptor and donor molecules.
F6-TCNNQ is one of the strongest organic acceptor molecules known and is widely used for doping and studying charge transfer effects [2]. We have mixed it with tetracene, a member of the family of acenes, which exhibit interesting optical properties and effects like singlet fission [3]. Although tetracene is already intensively studied, little is known about charge transfer interactions in blends with acceptors [4]. We study the photophysics of the observed charge-transfer states and discuss our findings based on the structural and morphological properties of tetracene/F6TCNNQ blends with different mixing ratios. This serves as starting point for further time-resolved investigations of this fundamentally interesting system.
[1] Forrest, S. R., Nature 428 (2004) [2] Koech, P. K., et al., Chemistry of Materials 22 (2010) [3] Smith, M. B., and Michl, J., Chemical Reviews 110 (2010) [4] Hu, P., et al., CrystEngComm 19 (2017)