Controllable growth of two-dimensional WSe2 using salt as co-solvent

Xiangzhuo Wang, Yongkai Li, La Zhuo, Jingchuan Zheng, Xianglin Peng, Zefeng Jiao, Xiaolu Xiong, Junfeng Han*, Wende Xiao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Various structures of two-dimensional (2D) WSe2 were controllably grown in a chemical vapor deposition (CVD) system. Using salt as the co-solvent and surfactant, we were able to grow monolayer single-crystalline WSe2 flakes with lateral size of up to 215 μm and monolayer polycrystalline WSe2 with lateral size of a few millimeters on amorphous SiO2 substrates. Optical microscopy, atomic force microscopy, Raman spectra, photoluminescence spectra and X-ray photoelectron spectra measurements disclosed high quality of as-grown 2D WSe2. Moreover, multilayer WSe2 flakes with spiral dislocations and uniform size were also achieved. Our study demonstrates that the salt-assisted CVD technique can be applied for the controllable synthesis of 2D transition metal dichalcogenides with various structures and morphologies, paving the way for developing novel catalysts and electronic devices.

Original languageEnglish
Pages (from-to)6267-6272
Number of pages6
JournalCrystEngComm
Volume20
Issue number40
DOIs
Publication statusPublished - 2018

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