Abstract
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 in 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 a horizontal quartz-tube Chemical Vapor 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 a controlled thickness and composition and further potential for integration in functional heterostructures for future nanoelectronic and optoelectronic devices.
Highlights
Noble TMDs 2D materials, are displaying many fascinating properties including widely tunable bandgap, moderate carrier mobility, anisotropy, and high air stability [1,2,3].The nTMDs and the platinum diselenide PtSe2 show diverse chemical and physical properties which are intensively studied especially in a 2D form [4]
PtSe2 films grown by thermally assisted conversion of platinum at a complementary metal–oxide– semiconductor (CMOS)-compatible temperature shows excellent promise for future applications, including integration into CMOS production lines [9]
PtSe2 films were synthesized by two step Thermally Assisted Conversion (TAC) procedure [4]
Summary
Noble TMDs (nTMDs) 2D materials, are displaying many fascinating properties including widely tunable bandgap, moderate carrier mobility, anisotropy, and high air stability [1,2,3].The nTMDs and the platinum diselenide PtSe2 show diverse chemical and physical properties which are intensively studied especially in a 2D form [4]. The nTMDs and the platinum diselenide PtSe2 show diverse chemical and physical properties which are intensively studied especially in a 2D form [4]. PtSe2 films grown by thermally assisted conversion of platinum at a complementary metal–oxide– semiconductor (CMOS)-compatible temperature shows excellent promise for future applications, including integration into CMOS production lines [9]. The present study systematizes the initial technological steps of TAC synthesis of PtSe2 and corresponding quality verification via structural and chemical characterization by XRD, Raman spectroscopy and XPS.
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