Transport Properties of Lead Chalcogenide Nanocomposites

ORAL

Abstract

Lead chalcogenide dimensional nanocomposites were prepared by densifying nanocrystals, synthesized in high purity - high product yield employing an alkaline aqueous solution-phase reaction, by Spark Plasma Sintering. Transport properties were evaluated through temperature dependent resistivity, Hall, thermopower, and thermal conductivity measurements. The physical properties of these materials are strongly sensitivity to stoichiometry, doping, and porosity. The transport properties of the nanocomposites were compared to that of bulk polycrystalline materials with similar compositions and carrier concentrations. An enhancement of the room temperature thermoelectric properties of up to 30{\%} over that of the bulk was realized.

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Authors

  • George Nolas

    Department of Physics, University of South Florida, Tampa, FL, USA

  • Joshua Martin

    Department of Physics, University of South Florida, Tampa, FL, USA

  • Stevce Stefanoski

    Department of Physics, University of South Florida, Tampa, FL, USA

  • Li Wang

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

  • Lidong Chen

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China