- Influence of Boron Content on the Thermoelectric Properties of p-type Si0.8Ge0.2 Alloy
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Sung-Doo Hwang, Woo-Suk Choi, Ik-Min Park, Yong-Ho Park
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J Korean Powder Metall Inst. 2007;14(4):272-276.
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DOI: https://doi.org/10.4150/KPMI.2007.14.4.272
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 Abstract
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- P-type thermoelectric material Si_0.8Ge_0.2 was sintered by Hot Press process (HP) and the effect of boron (0.25sim2 at%) addition on the thermoelectric properties were reported. To enhance the thermoelectric performances, the Si_0.8Ge_0.2, alloys were fabricated by mechanical alloying (MA) and HP. The carrier of p-type SiGe alloy was controlled by B-doping. The effect of sintering condition and thermoelectric properties were investigated. B-doped SiGe alloys exhibited positive seebeck coefficient. The electrical conductivity and thermal conductivity were increased at the small amount of boron content (0.25sim0.5 at%). However, they were decreased over 0.5 at% boron content. As a result, the small addition of boron improved the Z value. The Z value of 0.5 at% B doped Si_0.8Ge_0.2 B alloy was 0.9times10-4/K, the highest value among the prepared alloys.
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