• Electrical conductivity, thermoelectric power and figure of merit of doped Bi-Sb tapes produced by melt spinning technique

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      https://www.ias.ac.in/article/fulltext/pram/034/03/0243-0248

    • Keywords

       

      Bismuth-antimony alloy; melt spinning technique; thermoelectric power; figure-of-merit; nearest neighbour hopping; localized states

    • Abstract

       

      Temperature dependence of electrical conductivity and thermoelectric power are presented for In and Pb doped Bi + 8.28 at % Sb quenched tapes between 77 and 300K. The results are explained in terms of model for disordered semiconductors. Analysis of our data on electrical conductivity indicates the presence of a temperature independent part and a strongly temperature dependent part. While theT independent part originates from band conduction, theT dependent component could be understood considering the presence of localized states. Thermoelectric figure-of-merit of these tapes are also measured at 300K, which shows a large enhancement (∼40%) over that reported earlier on thin Bi-Sb films. This suggests that doped Bi-Sb quenched tapes may be considered as a candidate for material in producing economic and light weight thermoelectric devices.

    • Author Affiliations

       

      T K Dey1

      1. Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur - 721 302, India
    • Dates

       
  • Pramana – Journal of Physics | News

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