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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 3: Molecular Electronics and Excited State Properties I
CPP 3.9: Vortrag
Montag, 16. März 2020, 11:45–12:00, ZEU 260
Excited State Dynamics of Tetracene-Acceptor Blends — •Christoph Theurer1, Julian Hausch1, Clemens Zeiser1, Vipilan Sivanesan2, Petra Tegeder2, and Katharina Broch1 — 1Eberhard Karls Universität Tübingen, Institut für Angewandte Physik, Tübingen — 2Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Heidelberg
Charge transfer between electron donating and accepting organic semiconductors (OSCs) is pivotal for exploiting the full potential of OSCs in devices [1].
Tetracene is a prototypical OSC and exhibits interesting optical properties and effects like singlet fission, making it a promising material for solar energy conversion [2]. The competition between charge transfer to organic acceptors and singlet fission has, however, received little attention in tetracene so far [3][4]. In this work, blends of tetracene and two common, strong acceptors, F6-TCNNQ and F4-TCNQ, have been grown and investigated. Based on thorough structural and morphological investigations we studied and compared the photophysics of blends with different mixing ratios. The dynamics of these fundamentally interesting systems were examined by transient absorption spectroscopy.
[1] Forrest, S. R., Nature 428 (2004) [2] Smith, M. B., and Michl, J., Chemical Reviews 110 (2010) [3] Hu, P., et al., CrystEngComm 19 (2017) [4] Yost, S., et al., Nature Chem 6 (2014)