Optimization of thermoelectric performance of SrSi2-based alloys via the modification in band structure and phonon-point-defect scattering.

Optimization of thermoelectric performance of SrSi2-based alloys via the modification in band structure and phonon-point-defect scattering.
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DOI:
10.3389/fchem.2014.00106
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发表时间:
2014
影响因子:
5.5
通讯作者:
Lue CS
Lue CS
中科院分区:
化学3区
文献类型:
--
作者:
Kuo YK;Ramachandran B;Lue CS

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碱土金属二硅化物的热电性质很大程度上取决于其费米能级附近的电子能带结构。特别是,带隙约为几十meV的窄带隙SrSi2是由无毒、天然丰富的元素组成的二硅化锶SrSi2,其热电性能对第三种元素的取代/合金化非常敏感。在本文中,我们总结了取代和缺Sr/富SrSi2合金的热电性能,以实现高热电品质因数(ZT)在电子和热电方面的实际应用,并探索进一步提高其ZT值的替代途径。
Thermoelectric properties of alkaline-earth-metal disilicides are strongly dependent on their electronic band structure in the vicinity of the Fermi level. In particular, the strontium disilicide, SrSi2 with a narrow band gap of about few tens of meV is composed of non-toxic, naturally abundant elements, and its thermoelectric properties are very sensitive to the substitution/alloying with third elements. In this article, we summarize the thermoelectric performance of substituted and Sr-deficient/Sr-rich SrSi2 alloys to realize the high thermoelectric figure-of-merit (ZT) for practical applications in the electronic and thermoelectric aspects, and also to explore the alternative routes to further improve its ZT value.
DOI: 10.1021/cm970397e
发表时间: 1997-12-01
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