Berlin 2024 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 11: Poster I (joint session DS/MM/O)

DS 11.9: Poster

Mittwoch, 20. März 2024, 17:00–19:00, Poster B

MOCVD synthesis of MoS2 and WS2 combination 2D heterostructures — •Nikolas Dominik, Sebastian Klenk, Florian Herdl, Cormac Ó Coileáin, Tanja Stimpel-Lindner, and Georg S. Duesberg — Institute of Physics, University of the Bundeswehr Munich & SENS Research Center, 85577 Neubiberg, Germany

Two-dimensional (2D) materials (such as MoS2 and WS2) are materials layered at the atomic scale. This gives them exceptional electrical, mechanical and optical properties, and makes them interesting for electronics, photovoltaics and sensing [1]. Van der Waals heterostructures composed of 2D materials expand on the possible range of properties and so have attracted extensive focus due to factors such as smooth heterostructure interfaces, ultrafast carrier transport, and high bandgap tunability [2].

Here we present the synthesis of MoS2/WS2 combination heterostructures via metal-organic chemical vapour deposition (MOCVD) using a high controllable industrial scale multi-precursor system, and show the clearly defined stacked nature of the films produced. We explore the growth parameter space using Raman and X-ray photoemission spectroscopy, and microscopy techniques. We complement our characterisation by examining the influences on the band structure of the layered material.

[1] Q. H. Wang et al., Nature Nanotech 7, 699-712 (2012)

[2] W. Xia et al., Nanoscale 9, 4324-4365 (2017)