Material and device properties of superacid-treated monolayer molybdenum disulfide

Abdullah Alharbi; Percy Zahl; Davood Shahrjerdi

doi:10.1063/1.4974046

Material and device properties of superacid-treated monolayer molybdenum disulfide

Abdullah Alharbi, Percy Zahl, Davood Shahrjerdi

Electrical and Computer Engineering

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

Abstract

We study the effects of chemical treatment with bis(trifluoromethane) sulfonimide superacid on material and device properties of monolayer molybdenum disulfide grown by chemical vapor deposition. Our spatially resolved photoluminescence (PL) measurements and device studies reveal two key findings due to the chemical treatment: (1) noticeable transformation of trions to neutral excitons, and (2) over 7-fold reduction in the density of mid-gap trap states. Specifically, a combination of scanning Auger microscopy and PL mapping reveals that the superacid treatment is effective in passivating the sulfur-deficient regions.

Original language	English (US)
Article number	033503
Journal	Applied Physics Letters
Volume	110
Issue number	3
DOIs	https://doi.org/10.1063/1.4974046
State	Published - Jan 16 2017

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4974046

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abstract = "We study the effects of chemical treatment with bis(trifluoromethane) sulfonimide superacid on material and device properties of monolayer molybdenum disulfide grown by chemical vapor deposition. Our spatially resolved photoluminescence (PL) measurements and device studies reveal two key findings due to the chemical treatment: (1) noticeable transformation of trions to neutral excitons, and (2) over 7-fold reduction in the density of mid-gap trap states. Specifically, a combination of scanning Auger microscopy and PL mapping reveals that the superacid treatment is effective in passivating the sulfur-deficient regions.",

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AU - Zahl, Percy

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AB - We study the effects of chemical treatment with bis(trifluoromethane) sulfonimide superacid on material and device properties of monolayer molybdenum disulfide grown by chemical vapor deposition. Our spatially resolved photoluminescence (PL) measurements and device studies reveal two key findings due to the chemical treatment: (1) noticeable transformation of trions to neutral excitons, and (2) over 7-fold reduction in the density of mid-gap trap states. Specifically, a combination of scanning Auger microscopy and PL mapping reveals that the superacid treatment is effective in passivating the sulfur-deficient regions.

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Material and device properties of superacid-treated monolayer molybdenum disulfide

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