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. 2015 Apr 6;9(4):4611–4620. doi: 10.1021/acsnano.5b01281

Figure 2.

Figure 2

Optical properties of large-area monolayer MoS2. (a) Raman spectra of as-grown monolayer MoS2 on sapphire and monolayer MoS2 exfoliated from bulk crystals and transferred onto sapphire. (b) Photoluminescence spectra of as-grown monolayer MoS2 on sapphire and monolayer MoS2 exfoliated from bulk crystals onto sapphire. Black lines in parts a and b correspond to fits. (c) UV–vis optical absorbance spectra acquired from large-area monolayer MoS2 showing the A and B absorption peaks due to band-edge excitons as well as C and D peaks associated with van Hove singularities of MoS2.