Synthesis, crystal structure and thermoelectric properties of β-K 2Bi 8Se 13 solid solutions
Chung, D. Y.
Dyck, J. S.
Kannewurf, C. R.
Paraskevopoulos, K. M.
Kanatzidis, M. G.
ΕκδότηςAffiliation: Department of Chemistry, Michigan State University, East Lansing, MI 48824, United States
Affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, United States
Affiliation: Department of Electrical Engineering, Michigan State University, East Lansing, MI 48824, United States
Affiliation: Department of Electrical Engineering, Northwestern University, Evanston, IL 60208, United States
Affiliation: Department of Physics, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece
Correspondence Address: Kyratsi, T.
Department of Chemistry, Michigan State University, East Lansing, MI 48824, United States
SourceMaterials Research Society Symposium - Proceedings
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MetadataΕμφάνιση πλήρους εγγραφής
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.