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Effects of Cl-Doping on Thermoelectric Transport Properties of Cu2Se Prepared by Spark Plasma Sintering

  • Min Ji Kim
  • Gil-Geun Lee
  • Woochul Kim
  • Kyomin Kim
  • Jang-Yeul Tak
  • Weon Ho Shin
  • Won-Seon Seo
  • Jisang Hong
  • Young Soo Lim
Topical Collection: International Conference on Thermoelectrics 2018
  • 12 Downloads
Part of the following topical collections:
  1. International Conference on Thermoelectrics 2018

Abstract

We present the thermoelectric transport properties of Cl-doped Cu2Se1−xClx (x = 0–0.08) compounds prepared by spark plasma sintering. Cl-doping resulted in a decrease in the electrical conductivity and an increase in the Seebeck coefficient of the compound due to the donor role of Cl. Furthermore, the incorporation of Cl caused the formation of a secondary CuCl phase, which affected the structural, electrical, and thermal properties of the compounds significantly. Although the melting of CuCl limited the operating temperature to ∼ 620 K, the Cl-doped compounds exhibited significantly reduced lattice thermal conductivity because of the presence of the CuCl secondary phase. The highest ZT of 0.6 at 620 K was achieved in Cu2Se0.92Cl0.08, and the effects of CuCl on the thermoelectric transport properties of Cl-doped Cu2Se1−xClx compounds are discussed in detail.

Keywords

Thermoelectric Cu2Se spark plasma sintering lattice thermal conductivity 

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Min Ji Kim
    • 1
  • Gil-Geun Lee
    • 1
  • Woochul Kim
    • 2
  • Kyomin Kim
    • 2
  • Jang-Yeul Tak
    • 3
  • Weon Ho Shin
    • 3
  • Won-Seon Seo
    • 3
  • Jisang Hong
    • 4
  • Young Soo Lim
    • 1
  1. 1.Department of Materials System EngineeringPukyong National UniversityBusanKorea
  2. 2.School of Mechanical EngineeringYonsei UniversitySeoulKorea
  3. 3.Energy and Environmental DivisionKorea Institute of Ceramic Engineering and TechnologyJinjuKorea
  4. 4.Department of PhysicsPukyong National UniversityBusanKorea

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