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Platinum diselenide (PtSe2) as a part of 2D noble transition metal dichalcogenides (nTMDCs) offer diverse optoelectronic properties which can be effectively controlled as number of layers and engineered for novel applications. In this context, our study is focused on structural and compositional characteristics of large area synthesized PtSe2 ultrathin films. In addition, optical properties analysis as a way to track the quality of PtSe2 at different synthesized stages using thermal assisted conversion (TAC) of chemical vapor deposition (CVD) was performed.

In this paper we report on the synthesis details of WSe2 nanolayers by thermally assisted selenization method of pre-deposited tungsten films in Chemical Vapour Deposition (CVD) reactor. Optical microscopy reveals WSe2 domains uniformly distributed with predominantly triangular shapes. Raman spectroscopy as well as UV-VIS-NIR spectrophotometry and sheet resistance measurements are used for characterization of the obtained 2D WSe2.