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

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Yttrium-doped Y x Bi2−x Te3 (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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Authors and Affiliations

  1. School of Physical Engineering and Laboratory of Material Physics, Zhengzhou University, Zhengzhou, 450052, China

    Wenyu Shi, Fang Wu, Kunlun Wang, Jingjing Yang, Hongzhang Song & Xing Hu

  2. Department of Physics, Henan Institute of Education, Zhengzhou, 450053, China

    Fang Wu

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  1. Wenyu Shi
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  2. Fang Wu
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  3. Kunlun Wang
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  4. Jingjing Yang
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  5. Hongzhang Song
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  6. Xing Hu
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Correspondence to Xing Hu.

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Shi, W., Wu, F., Wang, K. et al. Preparation and Thermoelectric Properties of Yttrium-Doped Bi2Te3 Flower-Like Nanopowders. J. Electron. Mater. 43, 3162–3168 (2014). https://doi.org/10.1007/s11664-014-3220-4

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  • DOI: https://doi.org/10.1007/s11664-014-3220-4

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