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- Suh, Joonki
- Semiconductor Nanotechnology Lab.
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Two-dimensional semiconductor alloys: Monolayer Mo1-xWxSe2
- Author(s)
- 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
- Issued Date
- 2014-01
- Citation
- APPLIED PHYSICS LETTERS, v.104, no.1, pp.012101
- 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.
- Publisher
- AMER INST PHYSICS
- ISSN
- 0003-6951
- Keyword
- METAL DICHALCOGENIDE ALLOYS, MOS2, PHOTOLUMINESCENCE, EXCITONS, DEFECTS, BANDGAP
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