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Enhancement of the Thermoelectric Properties of Cu1.98Se by Na Doping

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Abstract

Cu1.98−xNaxSe nanopowders were synthesized using a hydrothermal method and hot-pressed into bulk pellets to assess the effects of Na doping on the thermoelectric properties of Cu1.98Se. The original layered microstructure was maintained at low doping levels, although nanopores, together with point defects, appeared to decrease the thermal conductivity. The thermoelectric properties of the material were improved by Na doping, resulting in a maximum ZT value of 1.32 for Cu1.94Na0.04Se at 973 K. The experimental data indicate that an optimal level of Na doping effectively improves the thermoelectric performance of non-stoichiometric Cu1.98Se.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (Grant No. 61774136), the China and Henan Postdoctoral Science Foundation (Grant Nos. 2017M620303 and 2018M630833), and the Key Programs for Science and Technology Development of Henan Province (Grant Nos. 182102210183 and 182102210594). We thank Michael D. Judge, MSc, from Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

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Authors and Affiliations

  1. Key Laboratory of Material Physics of Ministry of Education, and Physical Engineering College, Zhengzhou University, Zhengzhou, 450052, China

    Z. Zhu, Y. W. Zhang, H. Z. Song & X. J. Li

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  1. Z. Zhu
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  2. Y. W. Zhang
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  3. H. Z. Song
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  4. X. J. Li
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Correspondence to H. Z. Song.

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Zhu, Z., Zhang, Y.W., Song, H.Z. et al. Enhancement of the Thermoelectric Properties of Cu1.98Se by Na Doping. J. Electron. Mater. 47, 7514–7519 (2018). https://doi.org/10.1007/s11664-018-6694-7

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  • DOI: https://doi.org/10.1007/s11664-018-6694-7

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