Synthesis, crystal structure and thermoelectric properties of β-K 2Bi 8Se 13 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

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3 Citations (Scopus)

Abstract

Solid solution series of the type K 2Bi 8-xSb xSe 13, K 2-xRb xBi 8Se 13 as well as K 2B 18Se 13-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 2B 18Se 13 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
Volume793
Publication statusPublished - Dec 1 2003
EventThermoelectric Materials 2003 - Research and Applications - Boston, MA., United States
Duration: Dec 1 2003Dec 3 2003

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ASJC Scopus subject areas

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

Cite this

Kyratsi, T., Chung, D. Y., Dyck, J. S., Uher, C., Lal, S., Loo, S., Hogan, T., Ireland, J., Kannewurf, C. R., Hatzikraniotis, E., Paraskevopoulos, K. M., & Kanatzidis, M. G. (2003). Synthesis, crystal structure and thermoelectric properties of β-K 2Bi 8Se 13 solid solutions. Materials Research Society Symposium - Proceedings, 793, 359-364.