Graphene Substrate for van der Waals Epitaxy of Layer-Structured Bismuth Antimony Telluride Thermoelectric Film

Eun Sung Kim, Jae Yeol Hwang, Kyu Hyoung Lee, Hiromichi Ohta, Young Hee Lee, Sung Wng Kim

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Researchers report a van der Waals (vdW) epitaxial growth of layer-structured BST alloy on graphene substrate as a proof of concept. They have successfully synthesized a high-quality epitaxial BST film on graphene transferred onto amorphous silica by the pulsed laser deposition (PLD) technique. The resultant high-quality epitaxial Bi0.5Sb1.5Te3 (BST) alloy thin film yields a high power factor of approximately 4.67 mW K-2 m-1 at 300 K, comparable to BST single crystal, as the surface of graphene substrate promotes a stable epitaxial growth of layered material, resulting in good crystallinity as well as low defect density of the film.

Original languageEnglish
Article number1604899
JournalAdvanced Materials
Volume29
Issue number8
DOIs
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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