Journal
JOURNAL OF APPLIED PHYSICS
Volume 108, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3517088
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Funding
- Brain Korea 21 program
- Ministry of Knowledge Economy, Republic of Korea [2008EID11P070000]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2008EID11P070000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Institute of Industrial Technology(KITECH) [2008-E-ID11-P-07-0-000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, the effect of Ag or Sb addition on the thermoelectric properties of PbTe including the Seebeck coefficient, the electrical resistivity, and the thermal conductivity, was studied in the temperature range from 323 to 723 K. The major carriers in the Ag-doped and the Sb-doped PbTe are holes and electrons, respectively. A degenerate semiconductor behavior in the electrical transport properties was observed in the Ag-doped, whereas the semi-metallic in the Sb-doped. It was suggested from the results of the Hall effect measurement and the Seebeck coefficient that the effective mass was significantly altered by the Sb-doping. The maximum dimensionless figure of merit, ZT, of Pb(1-x)Ag(x)Te and Pb(1-x)Sb(x)Te (x = 0.1) alloys showed 0.27 and 0.62 at 723 K, respectively. Based on the analysis of the Seebeck coefficient of the Ag or the Sb-doped PbTe, the interaction between Ag and Sb in PbTe, as expected in the AgPb(m)SbTe(m+2) (LAST-m), may be supposed. (c) 2010 American Institute of Physics. [doi: 10.1063/1.3517088]
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