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Influence of Sodium Chloride Doping on Thermoelectric Properties of p-type SnSe

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Abstract

We investigated the effect of NaCl doping on the thermoelectric properties of p-type Sn 1−x Na x SeCl x (x = 0, 0.005, 0.01, 0.02, 0.03 and 0.04) prepared by a method which combines rapid induction melting and rapid hot pressing. After introducing the NaCl into the SnSe system, the carrier concentration of SnSe is significantly increased from ∼4.55 × 1017 cm−3 to ∼3.95 × 1019 cm−3 at 300 K. An electrical conductivity of ∼102.5 S cm−1 was obtained at 473 K by addition of 2 mol.% NaCl. It was found that Cl was effective in reducing the thermal conductivity by inducing abundant defects. A maximum ZT value of 0.84 was achieved in the Na0.005Sn0.995SeCl0.005 sample at 810 K. This suggests that doping with NaCl is a facile and cost-effective method in optimizing the thermoelectric properties of SnSe materials.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51302248 and 51202149), Zhejiang Provincial Natural Science Foundation of China (Grant No. Y1110563).

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Authors and Affiliations

  1. Department of Physics, Zhejiang Normal University, Jinhua, 321004, People’s Republic of China

    Shi Dan Yang, Raymond Kwesi Nutor, Zi Jie Chen,  Hao Zheng & Jian Xiao Si

  2. Department of Physics, Shaoxing University, Shaoxing, 312000, People’s Republic of China

    Hai Fei Wu

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  1. Shi Dan Yang
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  2. Raymond Kwesi Nutor
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  3. Zi Jie Chen
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  4. Hao Zheng
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Correspondence to Jian Xiao Si.

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Yang, S.D., Nutor, R.K., Chen, Z.J. et al. Influence of Sodium Chloride Doping on Thermoelectric Properties of p-type SnSe. J. Electron. Mater. 46, 6662–6668 (2017). https://doi.org/10.1007/s11664-017-5715-2

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