Thermoelectric properties of Ge-doped Bi85Sb15 alloys at low temperatures
Thermoelectric properties of Ge-doped Bi85Sb15 alloys at low temperatures
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Ge掺杂Bi85Sb15合金的低温热电性能
DOI:
10.1016/j.jpcs.2013.12.006
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发表时间:
2014-04
影响因子:
4
通讯作者:
Laifeng Li
中科院分区:
文献类型:
--
作者:
Zhen Chen;Yemao Han;Min Zhou;Chunmei Song;Rongjin Huang;Yuan Zhou;Laifeng Li
Bulk polycrystalline Bi85Sb15−xGex(x=0, 0.5, 1, 1.5, 2) composites were prepared by mechanical alloying followed by pressureless sintering. The thermoelectric properties were studied in the temperature range of 77–300 K. The results indicate that increasing the Ge concentration causes the Seebeck coefficient to change sign from negative to positive. Moreover, it is found that the maximum value of the Seebeck coefficient can be precisely controlled with the Ge concentration. The maximum dimensionless figure of merit reaches 0.07 at 140 K. These results suggest that the preparation of p-type Bi–Sb alloys is possible by using the Ge-doping approach.
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通讯作者:
Sunglae Cho;A. DiVenere;G. Wong;J. Ketterson;J. Meyer
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