Enhanced thermoelectric properties by Ir doping of PtSb 2 with pyrite structure

Yoshihiro Nishikubo, Seiya Nakano, Kazutaka Kudo, Minoru Nohara

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The effects of Ir doping on the thermoelectric properties of Pt 1-xIr xSb 2 (x = 0, 0.01, 0.03, and 0.1) with pyrite structure were studied. Measurements of electrical resistivity ρ, Seebeck coefficient S, and thermal conductivity κ were conducted. The results showed an abrupt change from semiconducting behavior without Ir (x = 0) to metallic behavior at x = 0.01. The sample with x = 0.01 exhibited large S and low ρ, resulting in a maximum power factor (S 2/ρ) of 43 μW/cmK 2 at 400 K. The peculiar pudding mold-type electronic band dispersion could explain the enhanced thermoelectric properties in the metallic state.

Original languageEnglish
Article number252104
JournalApplied Physics Letters
Volume100
Issue number25
DOIs
Publication statusPublished - Jun 18 2012

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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