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Thermoelectric Properties of Cu2HgSnSe4-Cu2HgSnTe4 Solid Solution

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Abstract

Copper-based semiconductors from the family Cu2-II-IV-VI4 have recently attracted a great deal of attention because of their promising thermoelectric (TE) properties. Polycrystalline samples from the Cu2HgSnSe x Te4−x (x = 0, 0.8, 2, 3.2, 4) solid solution were prepared and structurally characterized by powder x-ray diffraction. The samples from this solid solution crystallize in the stannite structure (space group \(I\bar{4}2m\)). Transport, TE, and thermal properties of hot-pressed samples are reported. About a 20 % reduction in calculated lattice thermal conductivities, compared to the lattice thermal conductivities of pure components of the alloys (i.e. Cu2HgSnSe4 and Cu2HgSnTe4), was observed for Cu2HgSnSe2Te2 alloy. The maximum ZT of the Cu2HgSnSe2Te2 sample reaches 0.6 at 575 K.

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Acknowledgement

Financial support from the Grant Agency of the Czech Republic (GA CR), Project No. GA13-33056S, is greatly appreciated.

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  1. J. Navrátil

    Present address: Joint Laboratory of Solid State Chemistry, University of Pardubice, 53210, Pardubice, Czech Republic

Authors and Affiliations

  1. Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic v.v.i., Heyrovsky sq. 2, 120 06, Prague, Czech Republic

    J. Navrátil

  2. Faculty of Chemical Technology, University of Pardubice, 53210, Pardubice, Czech Republic

    V. Kucek, T. Plecháček, E. Černošková, Č. Drašar & P. Knotek

  3. Institute of Physics, ASCR v.v.i., Na Slovance 2, 182 21, Prague 8, Czech Republic

    F. Laufek

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  1. J. Navrátil
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  2. V. Kucek
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Correspondence to J. Navrátil.

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Navrátil, J., Kucek, V., Plecháček, T. et al. Thermoelectric Properties of Cu2HgSnSe4-Cu2HgSnTe4 Solid Solution. J. Electron. Mater. 43, 3719–3725 (2014). https://doi.org/10.1007/s11664-014-3075-8

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  • DOI: https://doi.org/10.1007/s11664-014-3075-8

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