Optical and Structural Properties of 3R-MoS2 Synthesized at High Pressure

Abstract

The rhombohedral (R3) phase of molybdenum disulfide (MoS₂) is synthesized from elemental components at high temperatures and pressures. The crystal structure and lattice constants are determined by full-profile X-ray diffraction analysis of the synthesized powder. Scanning electron microscopy in combination with energy-dispersive X-ray microanalysis confirms the formation of layered crystals with the elemental composition of Mo and S in the ratio of 1 : 2. Luminescence spectra of the 3R-MoS₂ bilayer transferred onto a SiO₂/Si substrate demonstrate narrow emission lines characteristic of low-defect materials.