Monolayers of WxMo1−xS2 alloy heterostructure with in-plane composition variations

We report the fabrication of single-crystal monolayer WxMo1−xS2 alloy triangles using chemical vapor deposition method. Raman and photoluminescence property are investigated in correlation to the composition. In the monolayer triangles, the photoluminescence peak shifts continuously from 687.4 nm at...

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Bibliographic Details
Published in:Applied physics letters 2015-02, Vol.106 (6)
Main Authors: Zheng, Shoujun, Sun, Linfeng, Yin, Tingting, Dubrovkin, Alexander M., Liu, Fucai, Liu, Zheng, Shen, Ze Xiang, Fan, Hong Jin
Format: Article
Language:English
Subjects:
Applied physics
Broadband
Chemical vapor deposition
Composition
Heterojunctions
Heterostructures
Light emission
Molybdenum disulfide
Monolayers
Organic chemistry
Photoluminescence
Single crystals
Triangles
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Summary:We report the fabrication of single-crystal monolayer WxMo1−xS2 alloy triangles using chemical vapor deposition method. Raman and photoluminescence property are investigated in correlation to the composition. In the monolayer triangles, the photoluminescence peak shifts continuously from 687.4 nm at the triangle center to 633.6 nm at the edge, corresponding to a switch from MoS2 to WS2 across the heterojunction. This composition-graded alloy may have interesting functions in broadband photodetection and multi-color light emission.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4908256