Nonmagnetic in substituted CuFe1 xInxS2 solid solution thermoelectric

Hongyao Xie, Xianli Su, Gang Zheng, Yonggao Yan, Wei Liu, Hao Tang, Mercouri G Kanatzidis, Ctirad Uher, Xinfeng Tang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

CuFeS2 is an environmentally friendly n-type thermoelectric material composed of earth-abundant, inexpensive and nontoxic elements. However, its rather undistinguished electronic properties combined with a high thermal conductivity lead to a low thermoelectric performance. In this work, an attempt is made to reduce the lattice thermal conductivity of CuFeS2 by In substituting on the Fe site. A series of CuFe1-xInxS2 (x = 0-0.08) compounds was synthesized by vacuum melting combined with the plasma activated sintering (PAS) process, and the effect of substituting In atoms on the band structure and thermoelectric properties of CuFeS2 has been investigated. The results show that the solubility limit of In in CuFeS2 is more than 8%. For the In content of 0.08, the lattice thermal conductivity of room temperature and at 630 K was reduced by 60% and 37%, respectively, indicating that substituting In for Fe is an effective method to reduce the lattice thermal conductivity of CuFeS2. A single parabolic band model was used to calculate the effective mass of all samples, and the data indicate that small amounts of In do not change the band structure of CuFeS2. Finally, the thermoelectric performance has been enhanced due to the large decrease in lattice thermal conductivity.

Original languageEnglish
Pages (from-to)27895-27902
Number of pages8
JournalJournal of Physical Chemistry C
Volume120
Issue number49
DOIs
Publication statusPublished - Jan 1 2016

Fingerprint

Solid solutions
Thermal conductivity
solid solutions
thermal conductivity
Band structure
vacuum melting
thermoelectric materials
Electronic properties
sintering
Melting
Sintering
solubility
Solubility
Earth (planet)
Vacuum
Plasmas
Atoms
room temperature
electronics
atoms

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Xie, H., Su, X., Zheng, G., Yan, Y., Liu, W., Tang, H., ... Tang, X. (2016). Nonmagnetic in substituted CuFe1 xInxS2 solid solution thermoelectric. Journal of Physical Chemistry C, 120(49), 27895-27902. https://doi.org/10.1021/acs.jpcc.6b10308

Nonmagnetic in substituted CuFe1 xInxS2 solid solution thermoelectric. / Xie, Hongyao; Su, Xianli; Zheng, Gang; Yan, Yonggao; Liu, Wei; Tang, Hao; Kanatzidis, Mercouri G; Uher, Ctirad; Tang, Xinfeng.

In: Journal of Physical Chemistry C, Vol. 120, No. 49, 01.01.2016, p. 27895-27902.

Research output: Contribution to journalArticle

Xie, H, Su, X, Zheng, G, Yan, Y, Liu, W, Tang, H, Kanatzidis, MG, Uher, C & Tang, X 2016, 'Nonmagnetic in substituted CuFe1 xInxS2 solid solution thermoelectric', Journal of Physical Chemistry C, vol. 120, no. 49, pp. 27895-27902. https://doi.org/10.1021/acs.jpcc.6b10308
Xie, Hongyao ; Su, Xianli ; Zheng, Gang ; Yan, Yonggao ; Liu, Wei ; Tang, Hao ; Kanatzidis, Mercouri G ; Uher, Ctirad ; Tang, Xinfeng. / Nonmagnetic in substituted CuFe1 xInxS2 solid solution thermoelectric. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 49. pp. 27895-27902.
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