Large-area few-layer MoS 2 deposited by sputtering

Jyun-Hong Huang, Hsing-Hung Chen, Pang-Shiuan Liu, Li-Syuan Lu, Chien-Ting Wu, Cheng-Tung Chou, Yao-Jen Lee, Lain-Jong Li, Wen-Hao Chang, Tuo-Hung Hou

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24 Scopus citations

Abstract

Direct magnetron sputtering of transition metal dichalcogenide targets is proposed as a new approach for depositing large-area two-dimensional layered materials. Bilayer to few-layer MoS2 deposited by magnetron sputtering followed by post-deposition annealing shows superior area scalability over 20 cm(2) and layer-by-layer controllability. High crystallinity of layered MoS2 was confirmed by Raman, photo-luminescence, and transmission electron microscopy analysis. The sputtering temperature and annealing ambience were found to play an important role in the film quality. The top-gate field-effect transistor by using the layered MoS2 channel shows typical n-type characteristics with a current on/off ratio of approximately 10(4). The relatively low mobility is attributed to the small grain size of 0.1-1 mu m with a trap charge density in grain boundaries of the order of 10(13) cm(-2).
Original languageEnglish (US)
Pages (from-to)065007
JournalMaterials Research Express
Volume3
Issue number6
DOIs
StatePublished - Jun 6 2016

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