Two-dimensional semiconductor alloys: Monolayer Mo1-xW xSe2

Sefaattin Tongay; Deepa S. Narang; Jun Kang; Wen Fan; Changhyun Ko; Alexander V. Luce; Kevin X. Wang; Joonki Suh; K. D. Patel; V. M. Pathak; Jingbo Li; Junqiao Wu

doi:10.1063/1.4834358

Two-dimensional semiconductor alloys: Monolayer Mo_1-xW _xSe₂

Sefaattin Tongay, Deepa S. Narang, Jun Kang, Wen Fan, Changhyun Ko, Alexander V. Luce, Kevin X. Wang, Joonki Suh, K. D. Patel, V. M. Pathak, Jingbo Li, Junqiao Wu

Research output: Contribution to journal › Article › peer-review

159 Scopus citations

Abstract

Monolayer Mo_1-xW_xSe₂ (x 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo _1-xW_xSe₂ 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 Mo_1-xW _xSe₂ alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors.

Original language	English (US)
Article number	012101
Journal	Applied Physics Letters
Volume	104
Issue number	1
DOIs	https://doi.org/10.1063/1.4834358
State	Published - Jan 6 2014
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.4834358

Cite this

@article{1b70c9949d2a466699d9caa73c5ac578,

title = "Two-dimensional semiconductor alloys: Monolayer Mo1-xW xSe2",

abstract = "Monolayer Mo1-xWxSe2 (x 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo 1-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-xW xSe2 alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors.",

author = "Sefaattin Tongay and Narang, {Deepa S.} and Jun Kang and Wen Fan and Changhyun Ko and Luce, {Alexander V.} and Wang, {Kevin X.} and Joonki Suh and Patel, {K. D.} and Pathak, {V. M.} and Jingbo Li and Junqiao Wu",

year = "2014",

month = jan,

day = "6",

doi = "10.1063/1.4834358",

language = "English (US)",

volume = "104",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "1",

}

TY - JOUR

T1 - Two-dimensional semiconductor alloys

T2 - Monolayer Mo1-xW xSe2

AU - Tongay, Sefaattin

AU - Narang, Deepa S.

AU - Kang, Jun

AU - Fan, Wen

AU - Ko, Changhyun

AU - Luce, Alexander V.

AU - Wang, Kevin X.

AU - Suh, Joonki

AU - Patel, K. D.

AU - Pathak, V. M.

AU - Li, Jingbo

AU - Wu, Junqiao

PY - 2014/1/6

Y1 - 2014/1/6

N2 - Monolayer Mo1-xWxSe2 (x 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo 1-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-xW xSe2 alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors.

AB - Monolayer Mo1-xWxSe2 (x 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo 1-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-xW xSe2 alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors.

UR - http://www.scopus.com/inward/record.url?scp=84892150566&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892150566&partnerID=8YFLogxK

U2 - 10.1063/1.4834358

DO - 10.1063/1.4834358

M3 - Article

AN - SCOPUS:84892150566

SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 1

M1 - 012101

ER -

Two-dimensional semiconductor alloys: Monolayer Mo_1-xW _xSe₂

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this