Dresden 2009 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 16: Poster I

DS 16.37: Poster

Dienstag, 24. März 2009, 09:30–12:30, P5

Thermoelectric wires of Pb_5+xSb_4−xS_11+x/2 with micro- and nanodimensions containing various metal ordering — •Gerald Wagner¹, Ronny Kaden¹, Klaus Bente¹, and Hartmut S. Leipner² — ¹Institut für Mineralogie, Kristallographie und Materialwissenschaft, Scharnhorststraße 20, Universität Leipzig, 04275 Leipzig — ²Interdisziplinäres Zentrum für Materialwissenschaften, Nanotechnikum Weinberg, Martin-Luther-Universität Halle, 06099 Halle

The synthesis of p-type boulangerite (x=0) and n-type falkmanite (x=0.5, Pb-rich boulangerite) allows us to produce a novel type of powerful thermoelectic material. Native metal ordering parallel and perpendicular to the wire axis can be used for lowering the thermal conductivity. Moreover, a one-dimensional metal order and Pb_5+xSb_4−xS_11+x/2 superlattices can be realized. We compare the physical properties of micro- and nanodimensional material. The specific influence of metal ordering (order–disorder phenomena) by thermal treatment is investigated. First results on structure investigations by high-resolution electron microscopy and electrical measurements are presented.