Two-dimensional semiconductor alloys: Monolayer Mo1−xWxSe2

2014181 citationsJournal Article

Authors

Sefaattin Tongay · University of California, Berkeley

Deepa S. Narang · Alliance University

Jun Kang · Lawrence Berkeley National Laboratory

Wen Fan · University of California, Berkeley

Changhyun Ko · University of California, Berkeley

Alexander Luce · University of California, Berkeley

Kevin X. Wang

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.

Topics & Keywords

2D Materials and Applications MXene and MAX Phase Materials Chalcogenide Semiconductor Thin Films

Publication Details

Published in: Applied Physics Letters

Volume 104, Issue 1

DOI: 10.1063/1.4834358

Field-Weighted Citation Impact: 9.00

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Two-dimensional semiconductor alloys: Monolayer Mo1−xWxSe2

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Abstract

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Publication Details