Fig 1.
(a) Schematic representation of the MoS2/Gr /MoS2 vertical heterostructure on SiO2 substrates containing micrometer-sized holes. (b) Optical image of the heterostructure (bar scale corresponds to 7 μm).
Fig 2.
(a) and (b) Raman spectra recorded on different Raman shift range for the different to the vertical heterostructure stacking configurations.
Fig 3.
(a) PL emission of suspended MoS2, MoS2/Gr, and MoS2/Gr/MoS2, recorded at room temperature (b) Proposed band alignment of MoS2/Gr/MoS2 heterostructure (c) Comparison of the PL spectra between suspended and supported structures.
Fig 4.
Photoluminescence spectra comparison between bare MoS2 and MoS2/MoS2 suspended and supported VHs.
Fig 5.
(a) Lorentzian fitting of the PL spectra collected from the different VH configurations of the sample. (b) Collected PL spectra of the suspended MoS2/Gr/MoS2 VH at different temperatures. (c- d) Intensity and peak position of exciton A and trion (X-) as a function of the temperature.