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

Cheng, Lina and Chen, Zhi-Gang and Yang, Lei and Han, Guang and Xu, Hong-Yi and Snyder, G. Jeffrey and Lu, Gao-Qing (Max) and Zou, Jin (2013) T-shaped Bi2Te3-Te heteronanojunctions: Epitaxial growth, structural modeling, and thermoelectric properties. The Journal of Physical Chemistry C, 117 (24). pp. 12458-12464. ISSN 1932-7447

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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 19 Jun 2017 06:30
Last Modified: 19 Jun 2017 06:30
Uncontrolled Keywords: figure of merits; heteronanojunctions; high-efficiency; low thermal conductivity; solvothermal method; structural modeling; thermoelectric devices; thermoelectric properties; structural design; nanotechnology; coatings and finishes; solid state physics;
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/jp4041666
URI: http://eprints.usq.edu.au/id/eprint/31711

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