Enhanced thermoelectric performance of Ag0.8Pb18SbTe20 alloyed with Se

Enhanced thermoelectric performance of Ag0.8Pb18SbTe20 alloyed with Se

Thermoelectric materials Ag0.8Pb18SbTe20 alloyed with Se in the composition of Ag0.8Pb18SbTe20–x Sex (x = 0, 5, 10, 15) were prepared by a high‐pressure method. The composition dependence of transport properties was studied from 100 K to room temperature. The thermal conductivity of Ag0.8Pb18SbTe20...

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Veröffentlicht in:Physica status solidi. A, Applications and materials science Applications and materials science, 2012-06, Vol.209 (6), p.1124-1127
Hauptverfasser: Su, Taichao, Zhou, Youmo, Li, Hongtao, Li, Shangsheng, Li, Xiaolei, Deng, Le, Su, Yantao, Liu, Jian, Sui, Yu, Ma, Hongan, Jia, Xiaopeng
Format: Artikel
Sprache:eng
Schlagworte:
Ag0.8Pb18SbTe20-xSex
high pressure synthesis
Metallurgy
thermoelectric materials
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Zusammenfassung:Thermoelectric materials Ag0.8Pb18SbTe20 alloyed with Se in the composition of Ag0.8Pb18SbTe20–x Sex (x = 0, 5, 10, 15) were prepared by a high‐pressure method. The composition dependence of transport properties was studied from 100 K to room temperature. The thermal conductivity of Ag0.8Pb18SbTe20 was depressed sharply by alloying with Se, and the Seebeck coefficient and resistivity were tuned effectively by adjusting the Se content. The maximum figure of merit ZT = 0.43 was obtained at x = 10, which is about 70% higher than that of the unalloyed sample.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201127501