Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 36: Poster III

HL 36.31: Poster

Wednesday, March 20, 2024, 18:00–20:30, Poster E

Synthesis and properties of 2D Janus materials — •Jens Osterfeld, Jennifer Schmeink, Osamah Kharsah, and Marika Schleberger — Universität Duisburg-Essen, Fakultät für Physik, Germany

Among two dimensional semiconductor materials, transition metal dichalcogenides (TMDCs), such as molybdenum disulfide, are studied the most. More recently, 2D Janus materials based on TMDCs were discovered. They can be created by exchanging one of the chalcogen layers in a base TMDC with another species of chalcogen atoms, thus forming an asymmetrical Janus structure with new, unique properties [1]. As the process selectively substitutes the top-most layer of chalcogen atoms with another kind, there is a likelihood of a partial substitution. In such instances the resulting material would resemble an alloy more closely than a Janus structure. These alloys consist of regions with different stoichiometry, which means they represent an ideal bridge between the characteristics of the base TMDC and the ideal Janus materials.

With my poster, I will showcase my latest achievements in synthesizing Janus materials and their alloys, and the characterization of their features with Raman and Photoluminescence spectroscopy.
[1] J. Schmeink et al., Nanoscale (2023), 15, 10834-10841

Keywords: Janus material; Optoelectronic properties; Alloy; TMDC