Effects of Cl-Doping on Thermoelectric Transport Properties of Cu 2 Se 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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present the thermoelectric transport properties of Cl-doped Cu 2 Se 1−x Cl x (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 Cu 2 Se 0.92 Cl 0.08 , and the effects of CuCl on the thermoelectric transport properties of Cl-doped Cu 2 Se 1−x Cl x compounds are discussed in detail.

Original languageEnglish
Pages (from-to)1958-1964
Number of pages7
JournalJournal of Electronic Materials
Volume48
Issue number4
DOIs
Publication statusPublished - 2019 Apr 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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