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Park, Youngsin
Center for Superfunctional Materials
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Temperature induced crossing in the optical bandgap of mono and bilayer MoS2 on SiO2

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Title
Temperature induced crossing in the optical bandgap of mono and bilayer MoS2 on SiO2
Author
Park, YoungsinChan, Christopher C. S.Taylor, Robert A.Kim, YongchulKim, NammeeJo, YongcheolLee, Seung W.Yang, WoochulIm, HyunsikLee, Geunsik
Issue Date
2018-03
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.8, pp.5380
Abstract
Photoluminescence measurements in mono- and bilayer-MoS2 on SiO2 were undertaken to determine the thermal effect of the MoS2/SiO2 interface on the optical bandgap. The energy and intensity of the photoluminescence from monolayer MoS2 were lower and weaker than those from bilayer MoS2 at low temperatures, whilst the opposite was true at high temperatures above 200 K. Density functional theory calculations suggest that the observed optical bandgap crossover is caused by a weaker substrate coupling to the bilayer than to the monolayer.
URI
https://scholarworks.unist.ac.kr/handle/201301/23905
URL
https://www.nature.com/articles/s41598-018-23788-3
DOI
10.1038/s41598-018-23788-3
ISSN
2045-2322
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SNS_Journal Papers
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