CsMBi(3)Te(6) and CsM(2)Bi(3)Te(7) (M = Pb, Sn): new thermoelectric compounds with low-dimensional structures.
The new materials CsPbBi(3)Te(6) and CsPb(2)Bi(3)Te(7) were discovered through reactions of CsBi(4)Te(6) with PbTe, whereas the isostructural materials CsSnBi(3)Te(6) and CsSn(2)Bi(3)Te(7) were discovered through corresponding reactions with SnTe. The compounds can also be prepared from stoichiometric mixtures of Cs(2)Te, Pb (Sn), Bi, and Te. The crystal structures show a layered architecture of NaCl-type slabs alternating with layers of Cs atoms. This group of compounds offers a new quaternary system, Cs-M-Bi-Te (M = Pb and Sn), available for thermoelectric investigations, including fine-tuning of compositions and doping.
Hsu
Kuei-Fang
KF
Department of Chemistry, Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824, USA.
Chung
Duck-Young
DY
Lal
Sangeeta
S
Mrotzek
Antje
A
Kyratsi
Theodora
T
Hogan
Tim
T
Kanatzidis
Mercouri G
MG