Preparation and Thermoelectric Properties of Yttrium-Doped Bi2Te3 Flower-Like Nanopowders

被引：0
作者：
Wenyu Shi
Fang Wu
Kunlun Wang
Jingjing Yang
Hongzhang Song
Xing Hu
机构：
[1] Zhengzhou University,School of Physical Engineering and Laboratory of Material Physics
[2] Henan Institute of Education,Department of Physics
来源：
Journal of Electronic Materials | 2014年 / 43卷
关键词：
Element doping; nanostructure; thermoelectric properties;
D O I：
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学科分类号：
摘要：
Yttrium-doped YxBi2−xTe3 (x = 0.15, 0.2, 0.25) flower-like nanopowders were synthesized by the hydrothermal method through careful adjustment of the amount of ethylenediaminetetraacetic acid surfactant. The flower-like nanopowders were hot pressed into bulk pellets, and the thermoelectric properties of the pellets were examined. The results showed that the optimized doped sample Y0.25Bi1.75Te3 had a relatively high Seebeck coefficient, a lower electrical resistivity, and a lower thermal conductivity. As a result, the figure of merit of the n-type Y0.25Bi1.75Te3 alloy reached 1.23 at 410 K.
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页码：3162 / 3168
页数：6
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