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

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

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 (US)
Pages (from-to)359-364
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume793
DOIs
StatePublished - 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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