Band Structures and Transport Properties of High-Performance Half-Heusler Thermoelectric Materials by First Principles.

Band Structures and Transport Properties of High-Performance Half-Heusler Thermoelectric Materials by First Principles.
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基于第一性原理的高性能Half-Heusler热电材料的能带结构和输运特性

DOI:
10.3390/ma11050847
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发表时间:
2018-05-19
期刊:
Materials (Basel, Switzerland)
影响因子:
--
通讯作者:
Zhu T
Zhu T
中科院分区:
其他
文献类型:
--
作者:
Fang T;Zhao X;Zhu T

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价电子数为 8 或 18 的 Half-Heusler (HH) 化合物由于其优异的电性能、强大的机械性能和良好的高温热稳定性,作为有前途的高温热电 (TE) 材料而受到欢迎。借助第一性原理计算,半霍斯勒热电材料取得了巨大进展。在这篇综述中,我们总结了一些关于 HH 化合物的能带结构和输运性质的代表性理论工作。我们介绍如何使用基本的能带结构计算来研究 n 型 MNiSb (M = Ti, Zr, Hf) 化合物中的原子无序性,并指导能带工程以增强 p 型 FeRSb (R = V, Nb) 基系统中的 TE 性能。还演示了电传输特性(尤其是散射时间)和晶格热导率的计算。并对HH TE材料第一性原理计算的未来研究方向进行了展望。
Half-Heusler (HH) compounds, with a valence electron count of 8 or 18, have gained popularity as promising high-temperature thermoelectric (TE) materials due to their excellent electrical properties, robust mechanical capabilities, and good high-temperature thermal stability. With the help of first-principles calculations, great progress has been made in half-Heusler thermoelectric materials. In this review, we summarize some representative theoretical work on band structures and transport properties of HH compounds. We introduce how basic band-structure calculations are used to investigate the atomic disorder in n-type MNiSb (M = Ti, Zr, Hf) compounds and guide the band engineering to enhance TE performance in p-type FeRSb (R = V, Nb) based systems. The calculations on electrical transport properties, especially the scattering time, and lattice thermal conductivities are also demonstrated. The outlook for future research directions of first-principles calculations on HH TE materials is also discussed.
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