Improving thermoelectric performance of caged compounds through light-element filling

被引：172

作者：

Pei, Y. Z. ^{[1
]}

Yang, Jiong ^{[1
,2
]}

Chen, L. D. ^{[1
]}

Zhang, W. ^{[1
]}

Salvador, J. R. ^{[2
]}

Yang, Jihui ^{[2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Gen Motors R&D Ctr, Mat & Proc Lab, Warren, MI 48090 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 04期

关键词：

antimony alloys; cobalt alloys; Fermi level; phonons; power factor; sodium alloys; thermal conductivity; thermoelectricity; TRANSPORT-PROPERTIES;

D O I：

10.1063/1.3182800

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Heavy elements filling have been considered the most effective way to improve the thermoelectric performance of caged compounds such as CoSb3 by reducing k(L). Here, we show an opposite example of filling a light element, Na, into CoSb3 for obtaining high thermoelectric figure of merit ZT.ZT=1.25 at 850 K for Na0.48Co4Sb12 is one of the highest values among all reported single-element-filled CoSb3. The Na-filling scatters phonons less effectively but it results in relatively high mobility thus large power factor. This most likely comes from the extra electronic states near the Fermi level induced by Na.

引用

页数：3

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