Enhancement of Thermoelectric Figure of Merit by the Insertion of MgTe Nanostructures in p-type PbTe Doped with Na2Te

被引：118

作者：

Ohta, Michihiro ^{[1
,2
,4
]}

Biswas, Kanishka ^{[1
]}

Lo, Shih-Han ^{[3
]}

He, Jiaqing ^{[1
,3
]}

Chung, Duck Young ^{[2
]}

Dravid, Vinayak P. ^{[3
]}

Kanatzidis, Mercouri G. ^{[1
,2
]}

机构：

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

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

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

[4] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058568, Japan

来源：

ADVANCED ENERGY MATERIALS | 2012年 / 2卷 / 09期

关键词：

lead telluride; nanoprecipitates; electrical transport properties; thermal conductivity; thermoelectrics; DENSITY-OF-STATES; LEAD-TELLURIDE; SPINODAL DECOMPOSITION; THERMAL-CONDUCTIVITY; BULK MATERIALS; ALLOY SYSTEM; PERFORMANCE; EFFICIENCY; PBS; BAND;

D O I：

10.1002/aenm.201100756

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：

The thermoelectric properties of crystalline melt-grown ingots of p-type PbTexMgTe (x = 13 mol%) doped with Na2Te (12 mol%) were investigated over the temperature range of 300 K to 810 K. While the powder X-ray diffraction patterns show that all samples crystallize in the NaCl-type structure with no MgTe or other phases present, transmission electron microscopy reveals ubiquitous MgTe nanoprecipitates in the PbTe. The very small amounts of MgTe in PbTe have only a small effect on the electrical transport properties of the system, while they have a large effect on thermal transport significantly reducing the lattice thermal conductivity. A ZT of 1.6 at 780 K is achieved for the PbTe containing 2% MgTe doped with 2% Na2Te.

引用

页码：1117 / 1123

页数：7

共 55 条

[31] High figure of merit in partially filled ytterbium skutterudite materials [J].

Nolas, GS ;

Kaeser, M ;

Littleton, RT ;

Tritt, TM .

APPLIED PHYSICS LETTERS, 2000, 77 (12) :1855-1857

[32] Semiconducting Ge clathrates: Promising candidates for thermoelectric applications [J].

Nolas, GS ;

Cohn, JL ;

Slack, GA ;

Schujman, SB .

APPLIED PHYSICS LETTERS, 1998, 73 (02) :178-180

[33] Stabilizing the Optimal Carrier Concentration for High Thermoelectric Efficiency [J].

Pei, Yanzhong ;

LaLonde, Aaron D. ;

Heinz, Nicholas A. ;

Shi, Xiaoya ;

Iwanaga, Shiho ;

Wang, Heng ;

Chen, Lidong ;

Snyder, G. Jeffrey .

ADVANCED MATERIALS, 2011, 23 (47) :5674-+

[34] Combination of large nanostructures and complex band structure for high performance thermoelectric lead telluride [J].

Pei, Yanzhong ;

Heinz, Nicholas A. ;

LaLonde, Aaron ;

Snyder, G. Jeffrey .

ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (09) :3640-3645

[35] Convergence of electronic bands for high performance bulk thermoelectrics [J].

Pei, Yanzhong ;

Shi, Xiaoya ;

LaLonde, Aaron ;

Wang, Heng ;

Chen, Lidong ;

Snyder, G. Jeffrey .

NATURE, 2011, 473 (7345) :66-69

[36] High thermoelectric figure of merit in heavy hole dominated PbTe [J].

Pei, Yanzhong ;

LaLonde, Aaron ;

Iwanaga, Shiho ;

Snyder, G. Jeffrey .

ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (06) :2085-2089

[37] High Thermoelectric Performance in PbTe Due to Large Nanoscale Ag2 Te Precipitates and La Doping [J].

Pei, Yanzhong ;

Lensch-Falk, Jessica ;

Toberer, Eric S. ;

Medlin, Douglas L. ;

Snyder, G. Jeffrey .

ADVANCED FUNCTIONAL MATERIALS, 2011, 21 (02) :241-249

[38] High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys [J].

Poudel, Bed ;

Hao, Qing ;

Ma, Yi ;

Lan, Yucheng ;

Minnich, Austin ;

Yu, Bo ;

Yan, Xiao ;

Wang, Dezhi ;

Muto, Andrew ;

Vashaee, Daryoosh ;

Chen, Xiaoyuan ;

Liu, Junming ;

Dresselhaus, Mildred S. ;

Chen, Gang ;

Ren, Zhifeng .

SCIENCE, 2008, 320 (5876) :634-638

[39] Nanostructures versus solid solutions:: Low lattice thermal conductivity and enhanced thermoelectric figure of merit in Pb9.6Sb0.2Te10-xSex bulk materials [J].

Poudeu, Pierre F. P. ;

D'Angelo, Jonathan ;

Kong, Huijun ;

Downey, Adam ;

Short, Jarrod L. ;

Pcionek, Robert ;

Hogan, Timothy P. ;

Uher, Ctirad ;

Kanatzidis, Mercouri G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (44) :14347-14355

[40] High thermoelectric figure of merit and nanostructuring in bulk p-type Na1-xPbmSbyTem+2 [J].

Poudeu, Pierre F. R. ;

D'Angelo, Jonathan ;

Downey, Adam D. ;

Short, Jarrod L. ;

Hogan, Timothy P. ;

Kanatzidis, Mercouri G. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (23) :3835-3839

← 1 2 3 4 5 6 →