Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 10: 2D Materials beyond graphene: Growth, structure and substrate interaction (joint session O/HL/TT)
O 10.6: Talk
Monday, March 9, 2026, 16:15–16:30, HSZ/0204
Tailored growth of 2D alloy transition metal dichalcogenides with tunable optical and electrical properties using liquid precursors — •Md Tarik Hossain1, Axel Printschler1, Nhat Lam Duong1, Julian Picker1, Rahul Sharma1, Christof Neumann1, Mona Sedighi2, Johannes Biskupek2, Muhammad Sufyan Ramzan1, Caterina Cocchi1, Ute Kaiser2, and Andrey Turchanin1 — 1Friedrich Schiller University Jena, Jena, Germany — 2University of Ulm, Ulm, Germany
Doping or alloying of two-dimensional (2D) transition metal dichalcogenides (TMDs) provides a promising route to tune the optical, magnetic, and electronic properties. Here, we present a liquid-precursor-based chemical vapor deposition (CVD) for the controlled growth of large-area monolayer (VxWzMo1-x-y)S2 alloys with tunable optical and electrical properties. Comprehensive characterization using atomic force microscopy, transmission electron microscopy, Raman spectroscopy, photoluminescence (PL) spectroscopy, and ab initio calculations confirms the structural and optical quality. Notably, PL shows a noticeable defect exciton peak at room temperature in the V-doped monolayer. Furthermore, by adjusting the composition, we modulate the carrier type of these monolayers from n-type to p-type or even make the monolayers metallic for high vanadium concentrations, which is deduced from electrical transport measurements and density functional theory calculations. This work demonstrates high potential of liquid-precursor CVD as a platform for the tailored growth of complex 2D TMD alloys for next-generation optoelectronic devices.
Keywords: TMDs; CVD growth; 2D alloys