Preparation and thermoelectric properties of flower-like nanoparticles of Ce-Doped Bi2Te3

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• 作者：Fang Wu (1)
  Wenyu Shi (2)
  Xing Hu (2)
  
  1. School of Physical and Electronic Engineering ; Henan Institute of Education ; Zhengzhou ; 450053 ; China
  2. School of Physical Engineering and Laboratory of Material Physics ; Zhengzhou University ; Zhengzhou ; 450052 ; China
  
• 关键词：element doping ; nanostructure ; thermoelectric properties
• 刊名：Electronic Materials Letters
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：11
• 期：1
• 页码：127-132
• 全文大小：1,007 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Condensed Matter Physics
  Electronics, Microelectronics and Instrumentation
  Optical and Electronic Materials
  Thermodynamics
  Characterization and Evaluation of Materials
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2093-6788

文摘

Ce-doped Ce x Bi2-x Te3 (x = 0, 0.1, 0.2, 0.3) flower-like nanoparticles were synthesized by a hydrothermal method through a careful adjustment of the amount of ethylenediamine tetraacetic acid surfactant. The nanopowders of flower-like nanoparticles were hot-pressed into bulk pellets and the thermoelectric properties of the pellets examined. The results showed that Ce-doping increased the power factor effectively at low temperature; however, the thermal conductivity of the nanopowder too increased because of the lighter atomic mass of Ce compared to Bi. As a result, a ZT value of 1.22, higher than that of the undoped sample, was attained at 386 K for the Ce0.1Bi1.9Te3 sample.