Synthesis, crystal structure and thermoelectric properties of β-K 2Bi 8Se 13 solid solutions
Ημερομηνία
2003Συγγραφέας
Kyratsi, TheodoraChung, 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.
Εκδότης
Affiliation: Department of Chemistry, Michigan State University, East Lansing, MI 48824, United StatesAffiliation: 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
Source
Materials Research Society Symposium - ProceedingsVolume
793Pages
359-364Google Scholar check
Keyword(s):
Metadata
Εμφάνιση πλήρους εγγραφήςΕπιτομή
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.