SKM 2023 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 3: Organic Thin Films, Organic-Inorganic Interfaces (joint session DS/CPP)
DS 3.2: Vortrag
Montag, 27. März 2023, 11:45–12:00, SCH A 315
Determining Anisotropic Effects in Strongly Coupled Metal Organic Hybrid Structures — •Maximilian Rödel1, Jinhong Kim2, Matthias Stolte2, Luca Nils Philipp3, Matthias Lehmann2, Frank Würthner2, Roland Mitric3, and Jens Pflaum1,4 — 1Experimental Physics VI, University of Würzburg — 2Institut für Organische Chemie and Center for Nanosystems Chemistry, University of Würzburg — 3Institut für Physikalische und Theoretische Chemie, University of Würzburg — 4Bavarian Center for Applied Energy Research, 97074 Würzburg
Coupling phenomena in metal organic hybrid structures enable unique possibilities to tune the properties of opto-electronic devices. Furthermore, the strong coupling between surface plasmons and excitons in organic semiconductors leads to novel hybrid states, which are termed plexcitons[1]. By means of a Kretschmann Set Up we investigate these plexcitonic states in oriented liquid crystalline perylene bisimide (PBI) thin films deposited via off-centered spin coating on gold surfaces which exhibiting J-type coupling [2]. The Alignment of the hydrogen-bonded PBI molecules and, thus, their transition dipoles results in long-range ordered films with a pronounced spatially anisotropy of structural and optical characteristics. These new states show a characteristic coupling strength of ≈27 meV. Understanding this directional correlation between molecular order and optical properties will enable new device concepts utilizing the presented opto-electronic directionality.
[1] Maximilian Rödel et al. J. Phys. Chem. C 2022, 126(8), 4163-4171
[2] Stefanie Herbst et al. Nat. Commun. 2018, 9(1), 2646-2654.