Dresden 2017 – wissenschaftliches Programm
CPP 64.4: Vortrag
Freitag, 24. März 2017, 10:15–10:30, CHE 91
Structure of van der Waals bound Hybrids of Organic Semiconductors and Transition Metal Dichalcogenides: the Case of Acene Films on MoS2 — •Tobias Breuer, Tobias Maßmeyer, Alexander Mänz, Steffen Zoerb, Bernd Harbrecht, and Gregor Witte — Philipps-Universität Marburg, Germany
Transition metal dichalcogenides (TMDC) are important representatives in the emerging field of two-dimensional materials. At present, their combination with molecular films is discussed as it enables the realization of van der Waals bound organic/inorganic hybrids which are of interest in future device architectures. Here, we discuss the potential use of molybdenum disulfide (MoS2) as supporting substrate for the growth of well-defined, crystalline organic adlayers. By this means, hybrid systems between the TMDC surface and organic compounds
can be prepared, allowing for the profound investigation of mutual optical and electronic coupling mechanisms. As model system, we choose pentacene and perfluoropentacene as prototypical organic semiconductors and analyze their film formation on MoS2(001) surfaces. In both cases, we observe smooth, crystalline film growth in lying molecular configuration, hence enabling the preparation of welldefined hybrid systems. By contrast, on defective MoS2 surfaces both materials adopt an upright molecular orientation and exhibit distinctly different film morphologies. This emphasizes the importance of highly ordered TMDC surfaces with low defect density for the fabrication of well-defined hybrid systems.
T. Breuer et al., PSS RRL (2016), DOI: 10.1002/pssr.201600320