In Situ Nanostructure Generation and Evolution within a Bulk Thermoelectric Material to Reduce Lattice Thermal Conductivity

被引：107

作者：

Girard, Steven N. ^{[1
]}

He, Jiaqing ^{[1
,2
]}

Li, Changpeng ^{[3
]}

Moses, Steven ^{[3
]}

Wang, Guoyu ^{[3
]}

Uher, Ctirad ^{[3
]}

Dravid, Vinayak P. ^{[2
]}

Kanatzidis, Mercouri G. ^{[1
,4
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[4] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 08期

关键词：

Thermoelectric materials; thermal conductivity; nucleation and growth; semiconductors; FIGURE-OF-MERIT; SPINODAL DECOMPOSITION; PHASE-RELATIONS; PERFORMANCE; PBTE; GERMANIUM; SILICON; TEMPERATURE; SCATTERING; TRANSPORT;

D O I：

10.1021/nl100743q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We show experimentally the direct reduction in lattice thermal conductivity as a result of in situ nanostructure generation within a thermoelectric material. Solid solution alloys of the high-performance thermoelectric PbTe-PbS 8% can be synthesized through rapid cooling and subsequent high-temperature activation that induces a spontaneous nucleation and growth of PbS nanocrystals. The emergence of coherent PbS nanostructures reduces the lattice thermal conductivity from similar to 1 to similar to 0.4 W/mK between 400 and 500 K.

引用

页码：2825 / 2831

页数：7

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