Paper Title:
Fabrication and Thermoelectric Properties of p-Type Si0.8Ge0.2 Alloy Doped with Boron
  Abstract

P-type thermoelectric material Si0.8Ge0.2 was fabricated by mechanical alloying(MA) and Hot-Press Process(HP) The effect of Boron(0.25~2wt%) addition on the thermoelectric properties of p-type Si0.8Ge0.2 alloy was reported. Experiments showed that the electrical conductivity decreased with Boron content at temperature ranging from 500K to 1250K. The carrier concentration measured by the Hall effect measurement also decreased as a function of doping level. With increasing temperature, the Seebeck coefficient and the power factor increased with boron content. Based on measured results, the Figure of Merit (Z) value of 0.5 wt% Si0.8Ge0.2 alloy increased with the small addition of Boron, and reached maximum rapidly; the Z value was 0.9×10-3/K, the highest value among the prepared alloys.

  Info
Periodical
Materials Science Forum (Volumes 544-545)
Edited by
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
Pages
745-748
DOI
10.4028/www.scientific.net/MSF.544-545.745
Citation
S. D. Hwang, W. K. Min, I. M. Park, Y. D. Park, Y. S. Kim, Y. H. Park, "Fabrication and Thermoelectric Properties of p-Type Si0.8Ge0.2 Alloy Doped with Boron", Materials Science Forum, Vols. 544-545, pp. 745-748, 2007
Online since
May 2007
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