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Fabrication of Stacked MoS₂ Bilayer with Weak Interlayer Coupling by Reduced Graphene Oxide Spacer.

ABSTRACT: We fabricated the stacked bilayer molybdenum disulfide (MoS₂) by using reduced graphene oxide (rGO) as a spacer for increasing the optoelectronic properties of MoS₂. The rGO can decrease the interlayer coupling between the stacked bilayer MoS₂ and retain the direct band gap property of MoS₂. We observed a twofold enhancement of the photoluminescence intensity of the stacked MoS₂ bilayer. In the Raman scattering, we observed that the E¹_2g and A_1g modes of the stacked bilayer MoS₂ with rGO were further shifted compared to monolayer MoS₂, which is due to the van der Waals (vdW) interaction and the strain effect between the MoS₂ and rGO layers. The findings of this study will expand the applicability of monolayer MoS₂ for high-performance optoelectronic devices by enhancing the optical properties using a vdW spacer.

SUBMITTER: Oh HM

PROVIDER: S-EPMC6459906 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Fabrication of Stacked MoS2 Bilayer with Weak Interlayer Coupling by Reduced Graphene Oxide Spacer.

Oh Hye Min HM Kim Hyojung H Kim Hyun H Jeong Mun Seok MS

Scientific reports 20190411 1

We fabricated the stacked bilayer molybdenum disulfide (MoS2) by using reduced graphene oxide (rGO) as a spacer for increasing the optoelectronic properties of MoS2. The rGO can decrease the interlayer coupling between the stacked bilayer MoS2 and retain the direct band gap property of MoS2. We observed a twofold enhancement of the photoluminescence intensity of the stacked MoS2 bilayer. In the Raman scattering, we observed that the E1< ...[more]

PMID: 30976032

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