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Modulating Photoluminescence of Monolayer Molybdenum Disulfide by Metal-Insulator Phase Transition in Active Substrates

Authors
Hou, JiweiWang, XiFu, DeyiKo, ChanghyunChen, YabinSun, YufeiLee, SangwookWang, Kevin X.Dong, KaichenSun, YinghuiTongay, SefaattinJiao, LiyingYao, JieLiu, KaiWu, Junqiao
Issue Date
Jun-2016
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v.12, no.29, pp 3976 - 3984
Pages
9
Journal Title
SMALL
Volume
12
Number
29
Start Page
3976
End Page
3984
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/3301
DOI
10.1002/smll.201601021
ISSN
1613-6810
1613-6829
Abstract
The atomic thickness and flatness allow properties of 2D semiconductors to be modulated with influence from the substrate. Reversible modulation of these properties requires an “active,” reconfigurable substrate, i.e., a substrate with switchable functionalities that interacts strongly with the 2D overlayer. In this work, the photoluminescence (PL) of monolayer molybdenum disulfide (MoS2) is modulated by interfacing it with a phase transition material, vanadium dioxide (VO2). The MoS2 PL intensity is enhanced by a factor of up to three when the underlying VO2 undergoes the thermally driven phase transition from the insulating to metallic phase. A nonvolatile, reversible way to rewrite the PL pattern is also demonstrated. The enhancement effect is attributed to constructive optical interference when the VO2 turns metallic. This modulation method requires no chemical or mechanical processes, potentially finding applications in new switches and sensors.
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첨단소재·전자융합공학부 (신소재물리전공)
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