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나노 구조 물리 연구단
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A systematic study of the synthesis of monolayer tungsten diselenide films on gold foil

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Title
A systematic study of the synthesis of monolayer tungsten diselenide films on gold foil
Author(s)
Seok Joon Yun; Soo Min Kim; Ki Kang Kim; Young Hee Lee
Publication Date
2016-09
Journal
CURRENT APPLIED PHYSICS, v.16, no.9, pp.1216 - 1222
Publisher
ELSEVIER SCIENCE BV
Abstract
We report a systematic study of the synthesis of large-area monolayer WSe2 on gold foil by controlling the growth temperature and the partial pressure of hydrogen during chemical vapor deposition. The gold surface causes surface-mediated growth to form monolayer WSe2 films. The amount of the tungsten source is controlled by adjusting the partial pressure of hydrogen, which plays a role in the reduction of WO3 (solid phase) into WO3x (vapor phase). The coverage of monolayer WSe2 can be effectively controlled by changing either the partial pressure of hydrogen or the growth temperature at a fixed growth time under an Se-rich atmosphere, resulting in 100% coverage of the WSe2 film. The crystallinity and thickness uniformity are characterized by Raman spectroscopy, photoluminescence, and transmission electron microscopy. This characterization reveals that the quality of the WSe2 film is comparable to mechanically-exfoliated monolayer WSe2 and possesses good thickness uniformity. © 2016 Elsevier B.V.
URI
https://pr.ibs.re.kr/handle/8788114/2876
ISSN
1567-1739
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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