Ternary bismuth chalcogenides for thermoelectric applications. Synthesis and charge transport properties of new compounds in the K-Bi-S system

Mercouri G. Kanatzidis, Timothy J. McCarthy, Troy A. Tanzer, Li H. Chen, Tim Hogan, Carl R. Kannewurf, Lykourgos Iordanidis

Research output: Contribution to journalConference article

5 Citations (Scopus)


KBi6.33S10 and K2Bi8S13 were synthesized by the direct combination of K2S/Bi2S3 at high temperature (>700 °C). The reaction of K2S/3.3Bi2S3 at 800 °C revealed the presence of a new ternary sulfide KBi6.33S10 (I) (92% yield). The structure consists of blocks of Bi2Te3 and CdI2-type units that are connected to form a three-dimensional network with K+ ions located in the channels that run along the b-axis. The same reaction but with a different ratio, at 750 °C, gave the new ternary sulfide K2Bi8S13 (II) (94% yield). The structure of the shiny rod-like crystals is closely related to that of I. As in I, it also consists of Bi2Te3 and CdI2-type fragments that connect to form K+-filled channels. The two potassium atoms and one bismuth atom are disordered over three sites. Some preliminary electrical and optical properties of these materials are discussed.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - Jan 1 1996
EventProceedings of the 1995 Fall MRS Symposium - Boston, MA, USA
Duration: Nov 27 1995Nov 30 1995


ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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