Effects of crystal-alignment and grain shape on the thermoelectric properties of Bi0.5Sb1.5Te3 alloys

被引：5
|
作者：
Je, Koo-Chul [2 ]
Ko, Beyungduk [3 ]
Kim, Cham [4 ]
Kim, Hoyoung [1 ]
Kim, Dong-Hwan [1 ]
机构：
[1] Daegu Gyeongbuk Inst Sci & Technol, Taegu 704230, South Korea
[2] Anyang Univ, Dept Phys, Coll Liberal Arts & Sci, Gyeonggi Do 430714, South Korea
[3] Kwangwoon Univ, Dept Phys Elect, Seoul, South Korea
[4] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 517卷
基金：
新加坡国家研究基金会;
关键词：
Thermoelectric properties; Alignment; Grain shape; Quantum confinement; LATTICE THERMAL CONDUCTIVITY; TRANSPORT-PROPERTIES; SEMICONDUCTORS; FABRICATION; ANISOTROPY; MOBILITY; MODEL;
D O I：
10.1016/j.jallcom.2011.12.030
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 investigated the thermoelectric properties of sintered Bi0.5Sb1.5Te3 alloys containing grains for their alignment, sizes and shapes. The figure of merit can be improved as the result of lower resistivity by increasing the alignment, which is realized by using the spark plasma sintering method and a strong magnetic field. In addition, making the grains more spherical can improve the thermoelectric efficiency as a result of carrier quantum confinement and enhancement of the band gap energy. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：75 / 79
页数：5
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