a1 Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824.
a2 Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL 60208
a3 Department of Physics, University of Michigan, Ann Arbor, MI 48109
A solid state chemistry synthetic approach towards identifying new materials with potentially superior thermoelectric properties is presented. Materials with complex compositions and structures also have complex electronic structures which may give rise to high thermoelectric powers and at the same time possess low thermal conductivities. The structures and thermoelectric properties of several new promising compounds with K-Bi-Se, K-Bi-S, Ba-Bi- Te, Cs-Bi-Te, and Rb-Bi-Te are reported.