Record Seebeck coefficient and extremely low thermal conductivity in nanostructured SnSe

被引：66

作者：

Serrano-Sanchez, F. ^{[1
]}

Gharsallah, M. ^{[1
]}

Nemes, N. M. ^{[1
]}

Mompean, F. J. ^{[1
]}

Martinez, J. L. ^{[1
]}

Alonso, J. A. ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 08期

关键词：

THERMOELECTRIC PROPERTIES; FIGURE; MERIT;

D O I：

10.1063/1.4913260

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

SnSe has been prepared by arc-melting, as mechanically robust pellets, consisting of highly oriented polycrystals. This material has been characterized by neutron powder diffraction (NPD), scanning electron microscopy, and transport measurements. A microscopic analysis from NPD data demonstrates a quite perfect stoichiometry SnSe0.98(2) and a fair amount of anharmonicity of the chemical bonds. The Seebeck coefficient reaches a record maximum value of 668 mu VK-1 at 380 K; simultaneously, this highly oriented sample exhibits an extremely low thermal conductivity lower than 0.1W m(-1) K-1 around room temperature, which are two of the main ingredients of good thermoelectric materials. These excellent features exceed the reported values for this semiconducting compound in single crystalline form in the moderate-temperatures region and highlight its possibilities as a potential thermoelectric material. (C) 2015 AIP Publishing LLC.

引用

页数：4

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