Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Poster Wednesday: Organic Molecules on Inorganic Surfaces
O 69.6: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
Electronic Structure and Interaction between Organic Charge-Transfer Molecules on Single-Layer MoS2/Ag(111) — •Asieh Yousofnejad, Gaël Reecht, Christian Lotze, and Katharina J. Franke — Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
Organic electronic devices such as organic solar cells and organic light emission diodes are highly promising devices for future technologies. Organic solar cells constitute electron donor (D) and electron acceptor (A) molecules for efficient charge separation upon photon absorption. At the interface between donor and acceptor, charge transfer may occur even without illumination. Using scanning tunneling microscopy and scanning tunneling spectroscopy, we study the structure and electronic properties of DCV5T-Me2 (D) and C60 (A) on single-layer Molybdenum disulfide (SL-MoS2) on Ag(111). SL-MoS2 acts here as a decoupling semiconducting layer, which inhibits strong hybridization with the substrate. First, we investigate isolated islands formed by either C60 or DCV5T-Me2. Co-depositing both molecules on MoS2 also leads to homo-molecular islands. At the interface of C60 and DCV5T-Me2 islands, we find a modified electronic structure, suggesting a charge transfer between C60 and DCV5T-Me2.