Silicon-Based Thermoelectrics Made from a Boron-Doped Silicon Dioxide Nanocomposite

被引：21

作者：

Snedaker, Matthew L. ^{[1
]}

Zhang, Yichi ^{[1
]}

Birkel, Christina S. ^{[1
,2
]}

Wang, Heng ^{[3
]}

Day, Tristan ^{[3
]}

Shi, Yifeng ^{[4
]}

Ji, Xiulei ^{[5
]}

Kraemer, Stephan ^{[6
]}

Mills, Carolyn E. ^{[1
]}

Moosazadeh, Armin ^{[1
]}

Moskovits, Martin ^{[1
]}

Snyder, G. Jeffrey ^{[3
]}

Stucky, Galen D. ^{[1
,6
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA

[3] CALTECH, Pasadena, CA 91106 USA

[4] Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China

[5] Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA

[6] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 24期

关键词：

thermoelectrics; silicon germanium; magnesiothermic reduction; silica; germania; ALLOYS; REDUCTION; ENHANCEMENT; SCATTERING; STATE;

D O I：

10.1021/cm401990c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report a method for preparing p-type silicon germanium bulk alloys directly from a boron-doped silica germania nanocomposite. This is the first successful attempt to produce and characterize the thermoelectric properties of SiGe-based thermoelectric materials prepared at temperatures below the alloy's melting point through a magnesiothermic reduction of the silica-germania nanocomposite. We observe a thermoelectric power factor that is competitive with the literature record obtained for high energy ball milled nanocomposites. The large grain size in our hot pressed samples limits the thermoelectric figure of merit to 0.5 at 800 degrees C for an optimally doped Si80Ge20 alloy.

引用

页码：4867 / 4873

页数：7

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