Monolayer PtSe2, a New Semiconducting Transition-Metal-Dichalcogenide, Epitaxially Grown by Direct Selenization of Pt

Yeliang Wang, Linfei Li, Wei Yao, Shiru Song, J. T. Sun, Jinbo Pan, Xiao Ren, Chen Li, Eiji Okunishi, Yu Qi Wang, Eryin Wang, Yan Shao, Y. Y. Zhang, Hai Tao Yang, Eike F. Schwier, Hideaki Iwasawa, Kenya Shimada, Masaki Taniguchi, Zhaohua Cheng, Shuyun Zhou*Shixuan Du, Stephen J. Pennycook, Sokrates T. Pantelides, Hong Jun Gao

*此作品的通讯作者

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579 引用 (Scopus)

摘要

Single-layer transition-metal dichalcogenides (TMDs) receive significant attention due to their intriguing physical properties for both fundamental research and potential applications in electronics, optoelectronics, spintronics, catalysis, and so on. Here, we demonstrate the epitaxial growth of high-quality single-crystal, 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-principle 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 has also potential applications in valleytronics. (Graph Presented).

源语言英语
页(从-至)4013-4018
页数6
期刊Nano Letters
15
6
DOI
出版状态已出版 - 10 6月 2015
已对外发布

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