General Strategy for Two-Dimensional Transition Metal Dichalcogenides by Ion Exchange

Huihui Chen, Zhuo Chen*, Binghui Ge, Zhen Chi, Hailong Chen, Hanchun Wu, Chuanbao Cao, Xiangfeng Duan

*此作品的通讯作者

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20 引用 (Scopus)

摘要

The ability to control and vary the atomic compositions of two-dimensional (2D) layered semiconductors is of considerable importance for tailoring their electronic and optoelectronic properties. The current methods to tailor chemical composition of 2D layered semiconductors is largely limited to vapor phase chemistry, and solution phase chemistry is insufficiently explored to date. Here, we report a general approach to prepare 2D layered transition metal dichalcogenides (TMDs) by ion exchange reactions in solution phase. By choosing four typical layered metal dichalcogenides including MoS2, MoSe2, WS2 and SnS2 as representative cases, the feasibility and versatility of both cation and anion exchange reactions in layered metal dichalcogenides are confirmed. Transient absorption results indicate that exciton lifetime of these samples as excitation energy is increased. The optoelectronic properties of these TMD nanosheets after the ion exchange exhibit potential for future devices. Our strategy can be employed not only to modulate the atomic composition and electronic structures of layered TMDs, but also open up a new pathway for the fabrication of various hybrid heterostructures.

源语言英语
页(从-至)10019-10026
页数8
期刊Chemistry of Materials
29
23
DOI
出版状态已出版 - 12 12月 2017

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