The microstructure network and thermoelectric properties of bulk (Bi,Sb)2Te3

被引：14

作者：

Xie, Wenjie ^{[1
,2
]}

Hitchcock, Dale A. ^{[1
]}

Kang, Hye J. ^{[1
]}

He, Jian ^{[1
]}

Tang, Xinfeng ^{[2
]}

Laver, Mark ^{[3
,4
,5
]}

Hammouda, Boualem ^{[6
]}

机构：

[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[3] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[4] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-2100 Copenhagen, Denmark

[5] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[6] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 11期

基金：

美国国家科学基金会;

关键词：

MERIT; NANOSTRUCTURES; PERFORMANCE; DEVICES; FIGURE;

D O I：

10.1063/1.4752110

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report small-angle neutron scattering studies on the microstructure network in bulk (Bi,Sb)(2)Te-3 synthesized by the melt-spinning (MS) and the spark-plasma-sintering (SPS) process. We find that rough interfaces of multiscale microstructures generated by the MS are responsible for the large reduction of both lattice thermal conductivity and electrical conductivity. Our study also finds that subsequent SPS forms a microstructure network of similar to 10 nm thick lamellae and smooth interfaces between them. This nanoscale microstructure network with smooth interfaces increases electrical conductivity while keeping a low thermal conductivity, making it an ideal microstructure for high thermoelectric efficiency. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752110]

引用

页数：4

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