T-shaped Bi2Te3-Te heteronanojunctions: Epitaxial growth, structural modeling, and thermoelectric properties

Lina Cheng, Zhi Gang Chen*, Lei Yang, Guang Han, Hong Yi Xu, G. Jeffrey Snyder, Gao Qing Lu, Jin Zou

*Corresponding author for this work

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

Novel T-shaped Bi2Te3-Te heteronanojunctions composed of a rhombohedral structured Bi2Te3 nanoplate and a trigonal structured Te nanorod were fabricated by a simple and facile solvothermal method. A unique crystallographic relationship of [21̄1̄0]Bi2Te3/[21̄1̄0]Te and [0001]Bi2Te3//[0001]Te has been observed for this epitaxial growth. Such epitaxial nature between Bi2Te 3 nanoplates and Te nanorods is caused by their negligible lattice mismatches in the corresponding atomic planes. The interfaces between Bi 2Te3 nanoplates and Te nanorods lead to a low thermal conductivity in these heteronanojunctions, so that a promising figure of merit (ZT) value is obtained (0.73 ± 0.04 at 320 K). This study provides a new method and opportunity to engineer heteronanojunctions for high-efficiency thermoelectric devices for power generation.

Original languageEnglish (US)
Pages (from-to)12458-12464
Number of pages7
JournalJournal of Physical Chemistry C
Volume117
Issue number24
DOIs
StatePublished - Jun 20 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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