Material and device properties of superacid-treated monolayer molybdenum disulfide

Alharbi, Abdullah; Zahl, Percy; Shahrjerdi, Davood

doi:10.1063/1.4974046

Title: Material and device properties of superacid-treated monolayer molybdenum disulfide

Journal Article · 15 January 2017 · Applied Physics Letters

DOI: https://doi.org/10.1063/1.4974046 · OSTI ID:1368668

Alharbi, Abdullah ^[1]; Zahl, Percy ^[2]; Shahrjerdi, Davood ^[1]

New York Univ., Brooklyn, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Here, 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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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1368668

Report Number(s):: BNL--113995-2017-JA; KC0403020

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 110; ISSN APPLAB; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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