Synthesis, crystal structure and thermoelectric properties of β-K 2Bi8Se13 solid solutions

Theodora Kyratsi, Duck Young Chung, Jeff S. Dyck, Ctirad Uher, Sangeeta Lal, Sim Loo, Tim Hogan, John Ireland, Carl R. Kannewurf, Evripides Hatzikraniotis, Konstantinos M. Paraskevopoulos, Mercouri G. Kanatzidis

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


Solid solution series of the type K2Bi8-xSb xSe13, K2-xRbxBi8Se 13 as well as K2B18Se13-xS x were prepared and the distribution of the atoms (Bi/Sb, K/Rb and Se/S) on different crystallographic sites, the band gaps and their thermoelectric properties were studied. The distribution Se/S appears to be more uniform than the distribution of the Sb and Rb atoms in the β-K 2B18Se13 structure that shows preference in specific sites in the lattice. Band gap is mainly affected by Sb and S substitution. Seebeck coefficient measurements showed n-type character for all Se/S members. In the Bi/Sb series an enhancement of p-type character was observed. The thermoelectric performance as well as preliminary high temperature measurements suggest the potential of these materials for high temperature applications.

Original languageEnglish
Pages (from-to)359-364
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2003
EventThermoelectric Materials 2003 - Research and Applications - Boston, MA., United States
Duration: Dec 1 2003Dec 3 2003

ASJC Scopus subject areas

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

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