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

Cheng, Lina, Chen, Zhi-Gang, Yang, Lei, Han, Guang, Xu, Hong-Yi, Snyder, G. Jeffrey, Lu, Gao-Qing (Max) and Zou, Jin (2013) T-shaped Bi2Te3-Te heteronanojunctions: Epitaxial growth, structural modeling, and thermoelectric properties. Journal of Physical Chemistry C, 117 24: 12458-12464. doi:10.1021/jp4041666


Author Cheng, Lina
Chen, Zhi-Gang
Yang, Lei
Han, Guang
Xu, Hong-Yi
Snyder, G. Jeffrey
Lu, Gao-Qing (Max)
Zou, Jin
Title T-shaped Bi2Te3-Te heteronanojunctions: Epitaxial growth, structural modeling, and thermoelectric properties
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
1932-7455
Publication date 2013-06-01
Year available 2013
Sub-type Article (original research)
DOI 10.1021/jp4041666
Volume 117
Issue 24
Start page 12458
End page 12464
Total pages 7
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Formatted 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.
Keyword Figure of Merit
Bismuth Telluride
Nanowire Arrays
Low Temperature
Alloys
Nanostructures
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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