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

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/1.4974046 · OSTI ID:1368668
 [1];  [2];  [1]
  1. New York Univ., Brooklyn, NY (United States)
  2. 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; SC0012704
OSTI ID:
1368668
Alternate ID(s):
OSTI ID: 1361739
Report Number(s):
BNL-113995-2017-JA; APPLAB; R&D Project: 16080; KC0403020
Journal Information:
Applied Physics Letters, Vol. 110, Issue 3; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (5)

Density of defect states retrieved from the hysteretic gate transfer characteristics of monolayer MoS 2 field effect transistors journal January 2019
Near-field exciton imaging of chemically treated MoS 2 monolayers journal January 2018
Effect of Dielectric Environment on Excitonic Dynamics in Monolayer WS 2 journal September 2019
Dynamics of cleaning, passivating and doping monolayer MoS 2 by controlled laser irradiation journal August 2019
Light Emission Properties of 2D Transition Metal Dichalcogenides: Fundamentals and Applications journal August 2018