High thermoelectric performance of fullerene doped Bi0.5Sb1.5Te3 alloys

被引：12
|
作者：
Wang, Zhou [1 ,2 ]
Vemishetti, Aravindkumar [1 ,2 ]
Ejembi, John Idoko [1 ,2 ]
Wei, Guodong [1 ,2 ]
Zhang, Boliang [3 ]
Wang, Li [3 ]
Zhang, Yi [3 ]
Guo, Shengmin [3 ]
Luo, Jia [4 ]
Chepko, Corin [5 ]
Dai, Qilin [5 ]
Tang, JinKe [5 ]
Zhao, Guang-Lin [1 ,2 ]
机构：
[1] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA
[2] A&M Coll, Baton Rouge, LA 70813 USA
[3] Louisiana State Univ, Mech & Ind Engn Dept, Baton Rouge, LA 70803 USA
[4] Louisiana State Univ, Cain Dept Chem Engn, Baton Rouge, LA 70803 USA
[5] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2016年 / 205卷
基金：
美国国家科学基金会;
关键词：
Thermoelectrics; Bi0.5Sb1.5Te3; alloy; Fullerene; SILICON-GERMANIUM ALLOYS; THERMAL-CONDUCTIVITY; TRANSPORT-PROPERTIES; PHONON-SCATTERING; HIGH-TEMPERATURE; (BI; SB)(2)TE-3; FIGURE; MERIT;
D O I：
10.1016/j.mseb.2015.12.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, we report our recent experimental findings on the enhancement of thermoelectric performance of C-60 doped Bi0.5Sb1.5Te3 bulk alloys. Incorporation of a small amount of C-60 significantly reduces the crystalline particle size and leads to closely packed nanostructure, whilst slightly improve the electric conductivity in the measured temperature range. In addition, a minimum thermal conductivity of 0.4 W/(mK) at 358 K was observed, which is identified to be caused by the strong lattice phonon scattering at grain boundaries, yielding a high figure-of-merit ZT= 1.47 +/- 0.07 at 358 K. Our results demonstrate that the materials can be used for the development of advanced thermoelectrics. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：36 / 39
页数：4
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