Enhancement in the thermoelectric performance by y substitution on SrSi2

C. S. Lue, M. D. Chou, N. Kaurav, Y. T. Chung, Y. K. Kuo

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

We report the results of the Y substitution in Sr1-xY xSi2 with x≤0.15 via measuring the temperature- dependent electrical resistivity, thermal conductivity, as well as Seebeck coefficient. Upon substituting Y onto the Sr sites, the electrical resistivity exhibit semiconducting behavior and the room-temperature electrical resistivity tends to reduce for x≤0.08. The thermal conductivity also decreases with increasing the Y content. Moreover, the Seebeck coefficient has a substantial increase and a maximum of about 220 μV/K at around 80 K has been found for x=0.08. These promising effects lead to a significant enhancement in the thermoelectric performance characterized by the figure-of-merit, ZT. A room-temperature ZT value of approximately 0.4 is thus achieved for Sr 0.92 Y0.08 Si2, about one order of magnitude larger than that of stoichiometric SrSi2.

原文English
文章編號192105
期刊Applied Physics Letters
94
發行號19
DOIs
出版狀態Published - 2009

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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