Influence of nanoscale Ag2Te precipitates on the thermoelectric properties of the Sn doped P-type AgSbTe2 compound

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  • Rajeshkumar Mohanraman
    National Tsing Hua University 1 Department of Engineering and System Science, , Hsinchu, Taiwan
  • Raman Sankar
    National Taiwan University 4 Center for Condensed Matter Sciences, , Taipei, Taiwan
  • Fang-Cheng Chou
    National Taiwan University 4 Center for Condensed Matter Sciences, , Taipei, Taiwan
  • Chih-Hao Lee
    National Tsing Hua University 1 Department of Engineering and System Science, , Hsinchu, Taiwan
  • Yoshiyuki Iizuka
    Academia Sinica 5 Institute of Earth Sciences, , Taipei, Taiwan
  • I. Panneer Muthuselvam
    National Taiwan University 4 Center for Condensed Matter Sciences, , Taipei, Taiwan
  • Yang-Yuan Chen
    Academia Sinica 2 Institute of Physics, , Taipei, Taiwan

Description

<jats:p>We report a maximal figure of merit (ZT) value of 1.1 at 600 K was obtained for the sample of which x = 0.03, representing an enhancement greater than 20% compared with a pristine AgSbTe2 sample. This favorable thermoelectric performance originated from the optimal Sn2+ substitution for Sb3+ in AgSbTe2, which not only increased electrical conductivity but also led to a substantial reduction in thermal conductivity that was likely caused by an enhanced phonon-scattering mechanism through the combined effects of lattice defects and the presence of Ag2Te nanoprecipitates dispersed in the matrix.</jats:p>

Journal

  • APL Materials

    APL Materials 2 (9), 096114-, 2014-09-01

    AIP Publishing

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