Synthesis and evaluation of lead telluride/bismuth antimony telluride nanocomposites for thermoelectric applications

被引：34

作者：

Ganguly, Shreyashi ^{[2
]}

Zhou, Chen ^{[1
]}

Morelli, Donald ^{[1
]}

Sakamoto, Jeffrey ^{[1
]}

Uher, Ctirad ^{[3
]}

Brock, Stephanie L. ^{[2
]}

机构：

[1] Michigan State Univ, E Lansing, MI 48824 USA

[2] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA

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

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 12期

关键词：

Thermoelectric; Nanocomposite; Incipient wetness; Bismuth telluride; Lead telluride; Semiconductor; PBSE NANOCRYSTAL SOLIDS; QUANTUM-WELL STRUCTURES; FIGURE; PERFORMANCE; BI2TE3; MERIT;

D O I：

10.1016/j.jssc.2011.09.031

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Heterogeneous nanocomposites of p-type bismuth antimony telluride (Bi2-xSbxTe3) with lead telluride (PbTe) nanoinclusions have been prepared by an incipient wetness impregnation approach. The Seebeck coefficient, electrical resistivity, thermal conductivity and Hall coefficient were measured from 80 to 380 K in order to investigate the influence of PbTe nanoparticles on the thermoelectric performance of nanocomposites. The Seebeck coefficients and electrical resistivities of nanocomposites decrease with increasing PbTe nanoparticle concentration due to an increased hole concentration. The lattice thermal conductivity decreases with the addition of PbTe nanoparticles but the total thermal conductivity increases due to the increased electronic thermal conductivity. We conclude that the presence of nanosized PbTe in the bulk Bi2-xSbxTe3 matrix results in a collateral doping effect, which dominates transport properties. This study underscores the need for immiscible systems to achieve the decreased thermal transport properties possible from nanostructuring without compromising the electronic properties. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：3195 / 3201

页数：7

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