High thermoelectric performance in non-toxic earth-abundant copper sulfide

Ying He, Tristan Day, Tiansong Zhang, Huili Liu, Xun Shi*, Lidong Chen, G. Jeffrey Snyder

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

614 Scopus citations


A new type of high performance thermoelectric material Cu2-xS composed of non-toxic and earth-abundant elements Cu and S is reported. Cu 2-xS surprisingly has lower thermal conductivity and more strikingly reduced specific heat compared to the heavier Cu2Se, leading to an increased zT to 1.7.

Original languageEnglish (US)
Pages (from-to)3974-3978
Number of pages5
JournalAdvanced Materials
Issue number23
StatePublished - Jun 18 2014


  • copper sulfide
  • earth-abundant
  • non-toxic
  • phonon-liquid electron-crystal
  • thermoelectric

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)


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