Regensburg 2022 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 5: Organic Thin Films, Organic-Inorganic Interfaces

DS 5.6: Vortrag

Montag, 5. September 2022, 12:45–13:00, H17

Strong Quenching of Dye Fluorescence in Perylene Orange/TMDC Hybrid Structures — •Tim Völzer, Alina Schubert, Erik von der Oelsnitz, Ingo Barke, Sylvia Speller, Tobias Korn, and Stefan Lochbrunner — Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23, 18059 Rostock

While monolayer transition metal dichalcogenides (1L-TMDCs) have emerged as 2D semiconductors with multiple applications in optoelectronics, their combination with dye molecules to form promising hybrid structures, since they should allow charge transfer after optical excitation as required for photodetectors or solar cells. Here, we discuss the preparation of such systems, i.e. the deposition of perylene orange (PO) onto substrates by means of spin coating, stamping, and thermal vapor deposition (TVD) and compare these methods regarding the quality of the dye layer and practicability of the process. For TVD-fabricated 1L-TMDC/PO hybrid structures, we observe a drastic quenching of the dye fluorescence in terms of both intensity and lifetime reduction for all used TMDCs compared to hBN/PO references. This quenching is attributed to electron or hole transfer depending on the energy levels of the molecule and the specific TMDC, respectively.