Folded MoS2 layers with reduced interlayer coupling

Abstract

We study molybdenum disulfide (MoS2) structures generated by folding single- and bilayer MoS2 flakes. We find that this modified layer stacking leads to a decrease in the interlayer coupling and an enhancement of the photoluminescence emission yield. We additionally find that folded single-layer MoS2 structures show a contribution to photoluminescence spectra of both neutral and charged excitons, which is a characteristic feature of single-layer MoS2 that has not been observed in multilayer MoS2. The results presented here open the door to fabrication of multilayered MoS2 samples with high optical absorption while maintaining the advantageous enhanced photoluminescence emission of single-layer MoS2 by controllably twisting the MoS2 layers.

5 figures + 8 supp. info. figures

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Cited by in corpus (8)

• Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
• Electronic and optical properties of strained graphene and other strained 2D materials: a review
• Strain engineering in semiconducting two-dimensional crystals
• MoS${}_2$-on-paper optoelectronics: drawing photodetectors with van der Waals semiconductors beyond graphite
• Excitonic Absorption Signatures of Twisted Bilayer WSe${}_2$ by Electron Energy-Loss Spectroscopy
• Optical spectroscopy of interlayer coupling in artificially stacked MoS2 layers
• Electronic Properties of Defective MoS${}_2$ Monolayers Subject to Mechanical Deformations: A First-Principles Approach
• Effects of Reduced Interlayer Interactions on the K-point Excitons of MoS${}_2$ Nanoscrolls