Rare Metals

, Volume 37, Issue 4, pp 326–332 | Cite as

Enhanced thermoelectric performance of CoSbS0.85Se0.15 by point defect

  • Shan-Shan Zhang
  • Ding-Feng Yang
  • Nusrat Shaheen
  • Xing-Chen Shen
  • Dan-Dan Xie
  • Yan-Ci Yan
  • Xu Lu
  • Xiao-Yuan Zhou
Article
  • 65 Downloads

Abstract

In this study, we report the effect of Zn doping on the thermoelectric properties of Co1−x Zn x SbS0.85Se0.15 solid solutions (x = 0, 0.02, 0.05, 0.08). The results show the dimensionless figure of merit (zT) increases from 0.17 to 0.34 at 875 K for Co0.95Zn0.05SbS0.85Se0.15 sample, due to the noticeable decrease in the lattice thermal conductivity by introducing point defect, which is further confirmed by an analysis based on the Debye–Callaway–Klemens model. Meanwhile, the thermoelectric power factor is maintained at high temperatures. This work highlights the important role of point defect in improving the thermoelectric performance of CoSbS-based compounds.

Keywords

CoSbS Point defect Thermal conductivity Thermoelectric performance 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 11344010, 11404044 and 51472036) and the Fundamental Research Funds for the Central Universities (No. 106112016CDJZR308808).

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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Applied PhysicsChongqing UniversityChongqingChina
  2. 2.Institute of Microstructure and Properties of Advanced MaterialsBeijing University of TechnologyBeijingChina

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