Phonon engineering significantly reducing thermal conductivity of thermoelectric materials: a review
Phonon engineering significantly reducing thermal conductivity of thermoelectric materials: a review
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DOI：
10.1007/s12598-023-02302-3
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发表时间：
2023-07
期刊：
影响因子：
8.8
通讯作者：
Chuang Zhou;Bo Liang;W. Huang;J. Noudem;X. Tan;Junjie Jiang
中科院分区：
文献类型：
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作者：
Chuang Zhou;Bo Liang;W. Huang;J. Noudem;X. Tan;Junjie Jiang
晶格热导率是评价热电材料性能的一个基本参数。然而，基于德拜色散模型的κ L预测值往往高估了实验值。许多研究人员试图修改理论模型，并寻求更可靠的结果。本文综述了近年来声子色散模型的研究进展，并提出用修正的正弦声子色散模型可以最准确地确定晶格热导率。此外，综述了具有降低热电材料萨雷潜力的实验方法，例如，产生驻波或非谐晶格振动的方法。高浓度的驻波和非简谐晶格振动可以有效地抑制过度。最后，本文介绍了正弦声子色散在应用于真实的材料时所面临的挑战，这些挑战通常很复杂，因此很耗时，特别是在处理材料缺陷时。
Lattice thermal conductivity,, is a fundamental parameter for evaluating the performance of thermoelectric materials. However, the predicted value ofκLbased on the Debye dispersion model is often overestimated compared with the experimentally determined value. Many researchers have attempted to modify the theoretical model and have sought more reliable results. In this review, the recent progress in the study of phonon dispersion models is summarized and we propose that the lattice thermal conductivity can be most accurately determined by using the modified sinusoidal phonon dispersion model. Moreover, experimental methods that have the potential to reduce a thermoelectric material’sare reviewed, for example, methods that generate standing waves or anharmonic lattice vibrations. A high concentration of standing waves and anharmonic lattice vibrations can effectively suppress excessive. Finally, this review presents the challenges of sinusoidal phonon dispersion when applied to real materials, which are often complicated and therefore time-consuming, especially when dealing with material defects.Graphical abstract