Preparation and Thermoelectric Properties of Flower-Like Nanoparticles of Ce-Doped Bi2Te3

作者：Wu, Fang^*; Shi, Wenyu; Hu, Xing

来源：Electronic Materials Letters, 2015, 11(1): 127-132.

DOI：10.1007/s13391-014-4139-x

• element doping
• nanostructure
• thermoelectric properties

Ce-doped CexBi2-xTe3 (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 Ce0.1Bi(1.9)Te(3) sample.

• 出版日期2015-1
• 单位河南教育学院; 郑州大学