DataVXACS Applied Materials & InterfacesPaper
journal article·2025-04-30Open access

Tuning of MoS2 Photoluminescence in Heterostructures with CrSBr

Satyam Sahu, Oleksandr Volochanskyi, Vaibhav Varade, Luka Pirker, Viktor Zólyomi, János Koltai, Kseniia Mosina, Zdeněk Sofer, Otakar Frank, Jana Vejpravová, Martin Kalbáč, Matěj Velický

ACS Applied Materials & Interfaces· Volume 17· Issue 17
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Abstract

High Resolution Image Download MS PowerPoint Slide Monolayers of semiconducting transition metal dichalcogenides (TMDCs) are known for their unique excitonic photoluminescence (PL), which can be tuned by interfacing them with other materials. However, integrating TMDCs into van der Waals heterostructures often results in a significant quenching of the PL because of an increased rate of nonradiative recombination processes. We demonstrate a wide-range tuning of the PL intensity of monolayer MoS 2 interfaced with another layered semiconductor, CrSBr. We discover that a thin CrSBr up to ≈20 nm in thickness enhances the PL of MoS 2, while a thicker material causes PL quenching, which is associated with changes in the excitonic makeup driven by the charge redistribution in the CrSBr/MoS 2 heterostructure. Transport measurements, Kelvin probe force microscopy, and first-principles calculations indicate that this charge redistribution most likely causes n- to p-type doping transition of MoS 2 upon contact with CrSBr, facilitated by the type II band alignment and the tendency of CrSBr to act as an electron sink. Furthermore, we fabricate an efficient AC-regime photodetector with a responsivity of 10 5 A/W from a MoS 2 /CrSBr heterostructure.
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Research context

Electronic materials

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, Prague 182 23, Czech Republic

Department of Biophysics, Chemical and Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague 121 16, Czech Republic

Department of Physical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology in Prague, Technická 5, Prague 142 00, Czech Republic

Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague 121 16, Czech Republic

Hartree Centre

STFC Daresbury Laboratory

Department of Biological Physics, Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest 1117, Hungary

Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic

Funding

European Regional Development Fund · Ministerstvo ?kolstv?, Ml?de?e a Telov?chovy · Grantov? Agentura Cesk? Republiky · Akademie Ved Cesk? Republiky · Univerzita Karlova v Praze

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