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Synthesis and Characterizations of 2D Platinum Diselenide
1 , * 1 , 1, 2 , 3 , 4 , 1, 2
1  Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria
2  Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria, Bulgaria
3  Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, Sofia, Bulgaria
4  Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences, Sofia, Bulgaria


Platinum diselenide (PtSe2), which belongs to the transition metals dichalcogenide (TMDCs) class of 2D materials, is characterized with a transition from semimetal to semiconductor with a thickness variation from bulk to monolayer and found versatile applications especially in sensors and mid-infrared detectors. In this study we report the large-scale synthesis of PtSe2 layers by thermally assisted selenization of pre-deposited platinum films in horizontal quartz-tube Chemical Vapour Deposition (CVD) reactor. Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) are used for characterization of the obtained 2D PtSe2. It is observed that the Raman spectra of PtSe2 show strong dependence on the thickness (Pt deposition time). XPS analysis was applied to examine the chemical compositions in order to assess the quality of the synthesized PtSe2 films. All the studied properties reveal great potential to obtain continuous layers with controlled thickness and composition and further potential for integration in functional heterostructures for future nanoelectronic and optoelectronic devices.

Keywords: 2D materials, PtSe2, synthesis, Raman spectroscopy, XPS