Two-Dimensional Semiconductor Alloys: Monolayer Mo1-Xwxse2

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Title:	Two-Dimensional Semiconductor Alloys: Monolayer Mo1-Xwxse2
Authors:	Tongay, Sefaattin Narang, Deepa S Kang, Jun Fan, Wen Ko, Changhyun Luce, Alexander V Wang, Kevin X Suh, Joonki Patel, K D Pathak, V M Li, Jingbo Wu, Junqiao
Keywords:	Density Functional Theory Semiconductors Crystalline Solids Alloys Atomic Force Microscopy Auger Electron Spectroscopy Photoluminescence Raman Spectroscopy Scanning Electron Microscopy
Issue Date:	2014
Publisher:	Applied Physics Letters Amer Inst Physics
Citation:	Vol. 104, No. 1
Abstract:	Monolayer Mo1-xWxSe2 (x = 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo1-xWxSe2 monolayers are direct bandgap semiconductors displaying high luminescence and are stable in ambient. The bandgap values can be tuned by varying the W composition. Interestingly, the bandgap values do not scale linearly with composition. Such non-linearity is attributed to localization of conduction band minimum states around Mo d orbitals, whereas the valence band maximum states are uniformly distributed among W and Mo d orbitals. Results introduce monolayer Mo1-xWxSe2 alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors. (C) 2014 AIP Publishing LLC.
URI:	http://dx.doi.org/10.1063/1.4834358 http://gnanaganga.inflibnet.ac.in:8080/jspui/handle/123456789/15063
ISSN:	0003-6951 1077-3118
Appears in Collections:	Journal Articles

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