Cited by 240Thermal properties of materials2D Materials and ApplicationsThermography and Photoacoustic Techniques

Probing Anisotropic Thermal Conductivity of Transition Metal Dichalcogenides MX2 (M = Mo, W and X = S, Se) using Time‐Domain Thermoreflectance

Jiang, Puqing, Qian, Xin, Gu, Xiaokun, Yang, Ronggui·2017·Advanced Materials

Abstract

Transition metal dichalcogenides (TMDs) are a group of layered 2D semiconductors that have shown many intriguing electrical and optical properties. However, the thermal transport properties in TMDs are not well understood due to the challenges in characterizing anisotropic thermal conductivity. Here, a variable‐spot‐size time‐domain thermoreflectance approach is developed to simultaneously measure both the in‐plane and the through‐plane thermal conductivity of four kinds of layered TMDs (MoS 2, WS 2, MoSe 2, and WSe 2) over a wide temperature range, 80–300 K. Interestingly, it is found that both the through‐plane thermal conductivity and the Al/TMD interface conductance depend on the modulation frequency of the pump beam for all these four compounds. The frequency‐dependent thermal properties are attributed to the nonequilibrium thermal resistance between the different groups of phonons in the substrate. A two‐channel thermal model is used to analyze the nonequilibrium phonon transport and to derive the intrinsic thermal conductivity at the thermal equilibrium limit. The measurements of the thermal conductivities of bulk TMDs serve as an important benchmark for understanding the thermal conductivity of single‐ and few‐layer TMDs.

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Crossref · 10.1002/adma.201701068

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  • The variable spot size TDTR approach has been successfully applied to layered two-dimensional materials and bulk crystals.

    “This method has then been successfully applied in several studies of anisotropic materials including both layered two-dimensional materials (such as transition metal dichalcogenides 35 and their alloys 192 and boron nitride nanosheets 193 ) and bulk crystals (such as silicon carbide 33 ).”

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Authors
Jiang, P., Qian, X., Gu, X., & Yang, R.
Affiliations
  • University of Colorado Boulder (US)
  • Shanghai Jiao Tong University (CN)
Corresponding author
Yang, Ronggui
Venue
Advanced Materials
Publisher
Wiley
Published
2017-07-20
Volume
29
Issue
36
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W2736994172
Cited by
239
References
60
Citations by year
2026: 20 · 2025: 32 · 2024: 26 · 2023: 33 · 2022: 30 · 2021: 22 · 2020: 33 · 2019: 22 · 2018: 18 · 2017: 3
FWCI
8.78
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0846561, 1512776)
  • Defense Advanced Research Projects Agency (FA8650‐15‐1‐7524)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
  • Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
Keywords
transition metal dichalcogenides, anisotropic thermal conductivity, time-domain thermoreflectance, through-plane thermal conductivity, in-plane thermal conductivity, MoS2, tungsten disulfide, MoSe2, WSe2

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