Abstract
Single-layer transition-metal dichalcogenides (TMDs) attract considerable attention due to their interesting physical properties and potential applications. Here, we demonstrate the epitaxial growth of high-quality monolayer platinum diselenide (PtSe2), a new member of the layered TMDs family, by a single step of direct selenization of a Pt(111) substrate. A combination of atomic-resolution experimental characterizations and first-principles theoretic calculations reveals the atomic structure of the monolayer PtSe2/Pt(111). Angle-resolved photoemission spectroscopy measurements confirm for the first time the semiconducting electronic structure of monolayer PtSe2 (in contrast to its semimetallic bulk counterpart). The photocatalytic activity of monolayer PtSe2 film is evaluated by a methylene-blue photodegradation experiment, demonstrating its practical application as a promising photocatalyst. Moreover, circular polarization calculations predict that monolayer PtSe2 also has potential applications in valleytronics.
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Li, L. (2020). Monolayer PtSe2. In: Fabrication and Physical Properties of Novel Two-dimensional Crystal Materials Beyond Graphene: Germanene, Hafnene and PtSe2. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-15-1963-5_4
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DOI: https://doi.org/10.1007/978-981-15-1963-5_4
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