Thermal Conductivities and Interfacial Thermal Conductance of 2D WSe2

Yingtao Wang, Yuan Gao, Elham Easy, Eui Hyeok Yang, Baoxing Xu, Xian Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Atomically thin materials like graphene and semiconducting transition metal dichalcogenides (TMDCs) have drawn broad interest in recent years, provoking investigation into multiple properties. In this work, we used the Raman optothermal technique to measure the thermal transport properties of a popular TMDC material WSe2, in the single-atomic layer (1L) form in both suspended and supported form. We implemented more direct measurements of the 1L WSe2 under study, and discovered WSe2's absorption coefficient from the measurements. In addition, by comparing the response of 1L WSe2 using several kinds of laser spot sizes, we are able to obtain the lateral thermal conductivity of 1L WSe2 and the interfacial thermal conductance to the substrate. For 1L WSe2, the room-temperature thermal conductivity is 36 ± 12 W/(m•K) in supported form and 43 ± 13 W/(m•K) in suspended form. Significantly, the interfacial thermal conductance of 1L WSe2 is determined to be 2.89 ± 0.45 W/(m2•K), a parameter important for thermal management design and modeling of electronic devices.

Original languageEnglish
Title of host publication15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020
Pages575-579
Number of pages5
ISBN (Electronic)9781728172309
DOIs
StatePublished - 27 Sep 2020
Event15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020 - Virtual, San Diego, United States
Duration: 27 Sep 202030 Sep 2020

Publication series

Name15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020

Conference

Conference15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020
Country/TerritoryUnited States
CityVirtual, San Diego
Period27/09/2030/09/20

Keywords

  • Raman spectroscopy
  • WSe2
  • thermal conductivity

Fingerprint

Dive into the research topics of 'Thermal Conductivities and Interfacial Thermal Conductance of 2D WSe2'. Together they form a unique fingerprint.

Cite this