Direct Synthesis of Large-Scale WTe 2 Thin Films with Low Thermal Conductivity

Yu Zhou, Hyejin Jang, John M. Woods, Yujun Xie, Piranavan Kumaravadivel, Grace A. Pan, Jingbei Liu, Yanhui Liu, David G Cahill, Judy J. Cha

Research output: Contribution to journalArticle

Abstract

Large-scale, polycrystalline WTe 2 thin films are synthesized by atmospheric chemical vapor reaction of W metal films with Te vapor catalyzed by H 2 Te intermediates, paving a way to understanding the synthesis mechanism for low bonding energy tellurides and toward synthesis of single-crystalline telluride nanoflakes. Through-plane and in-plane thermal conductivities of single-crystal WTe 2 flakes and polycrystalline WTe 2 thin films are measured for the first time. Nanoscale grains and disorder in WTe 2 thin films suppress the in-plane thermal conductivity of WTe 2 greatly, which is at least 7.5 times lower than that of the single-crystalline flakes.

Original languageEnglish (US)
Article number1605928
JournalAdvanced Functional Materials
Volume27
Issue number8
DOIs
StatePublished - Feb 23 2017

Fingerprint

Thermal conductivity
tellurides
thermal conductivity
flakes
Thin films
synthesis
thin films
Vapors
vapors
Crystalline materials
metal films
Metals
Single crystals
disorders
single crystals
energy

Keywords

  • WTe
  • chemical vapor deposition
  • intermediate H Te
  • nanostructure engineering
  • thermal conductivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Zhou, Y., Jang, H., Woods, J. M., Xie, Y., Kumaravadivel, P., Pan, G. A., ... Cha, J. J. (2017). Direct Synthesis of Large-Scale WTe 2 Thin Films with Low Thermal Conductivity Advanced Functional Materials, 27(8), [1605928]. https://doi.org/10.1002/adfm.201605928

Direct Synthesis of Large-Scale WTe 2 Thin Films with Low Thermal Conductivity . / Zhou, Yu; Jang, Hyejin; Woods, John M.; Xie, Yujun; Kumaravadivel, Piranavan; Pan, Grace A.; Liu, Jingbei; Liu, Yanhui; Cahill, David G; Cha, Judy J.

In: Advanced Functional Materials, Vol. 27, No. 8, 1605928, 23.02.2017.

Research output: Contribution to journalArticle

Zhou, Y, Jang, H, Woods, JM, Xie, Y, Kumaravadivel, P, Pan, GA, Liu, J, Liu, Y, Cahill, DG & Cha, JJ 2017, ' Direct Synthesis of Large-Scale WTe 2 Thin Films with Low Thermal Conductivity ', Advanced Functional Materials, vol. 27, no. 8, 1605928. https://doi.org/10.1002/adfm.201605928
Zhou, Yu ; Jang, Hyejin ; Woods, John M. ; Xie, Yujun ; Kumaravadivel, Piranavan ; Pan, Grace A. ; Liu, Jingbei ; Liu, Yanhui ; Cahill, David G ; Cha, Judy J. / Direct Synthesis of Large-Scale WTe 2 Thin Films with Low Thermal Conductivity In: Advanced Functional Materials. 2017 ; Vol. 27, No. 8.
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