The upshift of the A 1g peak of MoS 2 and the upshift of the D and 2D peaks of SLG show that the electrons move from MoS 2 to graphene accompanied by the dielectric shielding effect on graphene. The interlayer coupling within graphene/MoS 2 vdWHs were characterized and analyzed by Raman spectroscopy, photoluminescence (PL) spectroscopy and optical contrast (OC) spectroscopy. Here, three groups of graphene/MoS 2 vdWHs were prepared by transferring 1–3 layers of graphene onto monolayer MoS 2. The graphene/MoS 2 vdWHs provide an ideal platform to reveal the good interfacial coupling between graphene and MoS 2 constituents. The interlayer coupling in van der Waals (vdW) heterostructures (vdWHs) is at the frontier of the fundamental research, underlying many optical behaviors.
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