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Potential Thermoelectric Performance from Optimization of Hole-Doped class='aps-inline-formula'>Bi2Se3

机译:通过优化掺杂空穴的 class =“ aps-inline-formula”> Bi 2 Se 3

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We present an analysis of the potential thermoelectric performance of hole-doped Bi2Se3, which is commonly considered to show inferior room temperature performance when compared to Bi2Te3. We find that if the lattice thermal conductivity can be reduced by nanostructuring techniques (as have been applied to Bi2Te3 in Refs.?[W. Xie, X. Tang, Y. Yan, Q. Zhang, and T.?M. Tritt, Unique Nanostructures and Enhanced Thermoelectric Performance of Melt-Spun BiSbTe Alloys, Appl. Phys. Lett. 94, 102111 (2009); B. Poudel et al., High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys, Science 320, 634 (2008).]) the material may show optimized ZT values of unity or more in the 300–500?K temperature range and thus be suitable for cooling and moderate temperature waste heat recovery and thermoelectric solar cell applications. Central to this conclusion are the larger band gap and the relatively heavier valence bands of Bi2Se3.
机译:我们对空穴掺杂的Bi2Se3的潜在热电性能进行了分析,与Bi2Te3相比,通常认为该性能显示出较差的室温性能。我们发现,如果可以通过纳米结构技术降低晶格的热导率(如参考文献[W. Xie,X. Tang,Y. Yan,Q. Zhang,and T.M. Tritt,熔纺BiSbTe合金的独特纳米结构和增强的热电性能,Appl。Phys。Lett。94,102111(2009); B.Poudel等人,纳米结构碲化铋锑大块合金的高热电性能,Science 320,634( 2008)。)该材料在300–500?K的温度范围内可能显示出最佳的ZT值等于或大于1,因此适用于冷却和中温余热回收以及热电太阳能电池应用。该结论的核心是Bi2Se3的较大带隙和相对较重的价带。

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