Zintl phases for thermoelectric devices
Zintl phases for thermoelectric devices
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DOI：
10.1039/b702266b
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发表时间：
2007-01-01
影响因子：
4
通讯作者：
Snyder, G. Jeffrey
中科院分区：
文献类型：
--
作者：
Kauzlarich, Susan M.;Brown, Shawna R.;Snyder, G. Jeffrey
通过将废热转化为电能并提高制冷系统的效率，热电装置可以在解决当今的能源问题方面发挥重要作用。提高热电效率（如通过热电材料的品质因数zT测量的）对于该技术的发展至关重要。特别是复杂的Zint 1相，使热电材料的理想候选者，因为必要的“电子晶体，声子玻璃”属性可以通过对Zint 1化学的理解来设计。最近的一个例子是发现Yb14MnSb11，一种过渡金属Zint1化合物，其zT是NASA目前使用的材料的两倍。这种观点概述了一种策略，发现新的高zT材料在Zint 1阶段，并提出了结果指向这种方法的成功。
By converting waste heat into electricity and improving the efficiency of refrigeration systems, thermoelectric devices could play a significant role in solving today's energy problems. Increasing the thermoelectric efficiency (as measured by the thermoelectric material's figure-of-merit, zT) is critical to the development of this technology. Complex Zint1 phases, in particular, make ideal candidates for thermoelectric materials because the necessary "electron-crystal, phonon-glass" properties can be engineered with an understanding of the Zint1 chemistry. A recent example is the discovery that Yb14MnSb11, a transition metal Zint1 compound, has twice the zT as the material currently in use at NASA. This perspective outlines a strategy to discover new high zT materials in Zint1 phases, and presents results pointing towards the success of this approach.