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Layer number dependence of out-of-plane electrical conductivity and Seebeck coefficient in continuous mono- to multilayer MoS2 films

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Abstract
We report on direct comparison of out-of-plane thermoelectric properties, such as Seebeck coefficient and electrical conductivity, of the atomically thin MoS2 films. The films were prepared by a chemical vapor deposition method and were simultaneously investigated using a Cu-sandwiched structure. Specifically, this is the first study that measures the out-of-plane Seebeck coefficients of atomically thin mono- and bilayer MoS2 at 300 K. At room temperature, out-of-plane Seebeck coefficients for MoS2 films with one, two, and seven layers were measured to be approximately 42.9, 72.8, and 112.4 μV/K, respectively. Such behavior is seen because the increasing number of MoS2 layers increases the density of states of a system. Contrary to the conventional thermoelectric materials, the electrical conductivities of these MoS2 films have the same tendency as the Seebeck coefficients. Our results show that the thermoelectric devices can utilize out-of-plane properties of MoS2 thin films with high power factors
Author(s)
Won-Yong LeeMin-Sung KangNo-Won ParkGil-Sung Kim웬 안 둑Jae Won ChoiYoung-Gui Yoon김용수Ho Won JangEiji SaitohSang-Kwon Lee
Issued Date
2021
Type
Article
Keyword
Out-of-plane Thermoelectric propertiesTwo-dimensional layered materialMolybdenum disulfideDensity of statesStrain effect
DOI
10.1039/D1TA07854B
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9544
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_crossref_primary_10_1039_D1TA07854B&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Layer%20number%20dependence%20of%20out-of-plane%20electrical%20conductivity%20and%20Seebeck%20coefficient%20in%20continuous%20mono-%20to%20multilayer%20MoS2%20films&offset=0&pcAvailability=true
Publisher
JOURNAL OF MATERIALS CHEMISTRY A
Location
영국
Language
영어
ISSN
2050-7488
Citation Volume
9
Citation Number
47
Citation Start Page
26896
Citation End Page
26903
Appears in Collections:
Natural Science > Physics
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