Berlin 2024 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 47: 2D Materials: Heterostuctures
HL 47.7: Talk
Thursday, March 21, 2024, 16:30–16:45, EW 201
Fabrication and Characterization of van der Walls Layers with Improved Interfacial Quality — •Laura Nicolette Schusser1, Nihit Saigal1, Hossein Ostovar1, Zdeněk Sofer2, and Ursula Wurstbauer1 — 1University of Münster, Germany — 2University of Chemistry and Technology Prague,Czech Republic
The rich physical properties of two-dimensional materials, such as transition-metal dichalcogenides (TMDC) and related heterostructures have ushered in a new era of emergent phases and the development of devices [1,2]. Micromechanical exfoliation combined with the deterministic dry transfer of two-dimensional crystals represents a critical advancement in the fabrication of heterostructures through the controlled stacking of two-dimensional materials [2]. However, the presence of interfacial residuals and contaminants adversely affects the quality of heterostructures, consequently impacting the electrical and optical properties of the material. We established a fully automated setup for the dry transfer of two-dimensional materials inside a glovebox in a controlled environment. The quality of bulk crystals plays a crucial role in the fabrication of heterostructures. We utilize photoluminescence (PL) spectroscopy combined with Raman spectroscopy for the characterization of 2D layers exfoliated from differently grown TMDC crystals. [1] N. Saigal et. al., Arxiv Preprint, (2023). [2]Y. Lei et al., ACS Nanoscience Au2.6(2022)
Keywords: TMDC; Fabrication; Micromechanical Exfoliation; Raman; PL