Regensburg 2010 – scientific programme
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DS: Fachverband Dünne Schichten
DS 13: Thermoelectric Thin Films and Nanostructures I
DS 13.2: Talk
Tuesday, March 23, 2010, 10:45–11:00, H8
Experimental and theoretical investigations of PbTe-based nanocomposites with different inclusion phases — Denis Petri1, Christoph Erk2, Gert Homm3, Markus Piechotka3, Peter J. Klar3, Sabine Schlecht2, and •Beate Paulus4 — 1Freie Universität Berlin, Institut für Chemie und Biochemie, Fabeckstraße 34-36, 14195 Berlin — 2Justus-Liebig-Universität Gießen, Institut für Anorganische und Analytische Chemie, Heinrich-Buff-Ring 58, 35392 Gießen — 3Justus-Liebig-Universitä t Gießen, I. Physikalisches Institut, Heinrich-Buff-Ring 16, 35392 Gießen — 4Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin
Nanocomposite thermoelectric materials made by co-ball-milling of lead telluride and an added inclusion phase of Sb2Te3, BiSbTe3, Bi2Te3 or AgSbTe2 were investigated. A cold-pressing/annealing approach was applied to the resulting powders and the thermopower and the electrical conductivity of the products were measured in the temperature range of 50-300 K. The two quaternary phases Pb10BiSbTe13 (n-type) and Pb10AgSbTe12 (p-type) show the most promising power factors within the series of nanocomposites investigated. These experimental investigations are supported by first principle calculations for the bulk and the surfaces on the different materials.