Enhanced Thermoelectric Properties in Highly Co-Doped Bi2Se3 by Density-of-State Effective Mass Increase
Seung Min Kang,
Kyu Hyoung Lee,
Jong Wook Roh
et al.
Abstract:Bi2Se3 alloys are promising thermoelectric materials for use at near room temperature. In this study, we investigated the thermoelectric transport properties of Co-doped Bi2Se3, Bi2−xCoxSe3 (x=0, 0.03, 0.06, 0.09, and 0.12) polycrystalline alloys. The electrical conductivity of Bi2Se3 increased with Co doping as the electron concentration increased. The power factor increased by 83% (1.17 mW/mK2) with the Co doping compared with 0.64 mW/mK2 for pristine Bi2Se3 at room temperature. The density-of-states effecti… Show more
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