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

doi:10.1021/jp4041666

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

53 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 language	English (US)
Pages (from-to)	12458-12464
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	24
DOIs	https://doi.org/10.1021/jp4041666
State	Published - 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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10.1021/jp4041666

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

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 [2{\=1}{\=1}0]Bi2Te3/[2{\=1}{\=1}0]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.",

author = "Lina Cheng and Chen, {Zhi Gang} and Lei Yang and Guang Han and Xu, {Hong Yi} and Snyder, {G. Jeffrey} and Lu, {Gao Qing} and Jin Zou",

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day = "20",

doi = "10.1021/jp4041666",

language = "English (US)",

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T1 - T-shaped Bi2Te3-Te heteronanojunctions

T2 - Epitaxial growth, structural modeling, and thermoelectric properties

AU - Cheng, Lina

AU - Chen, Zhi Gang

AU - Yang, Lei

AU - Han, Guang

AU - Xu, Hong Yi

AU - Snyder, G. Jeffrey

AU - Lu, Gao Qing

AU - Zou, Jin

PY - 2013/6/20

Y1 - 2013/6/20

N2 - 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.

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

Abstract

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