Enhancement of the thermoelectric properties in nanoscale and nanostructured materials
Enhancement of the thermoelectric properties in nanoscale and nanostructured materials
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DOI：
10.1039/c0jm02755c
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Jin, Song
中科院分区：
文献类型：
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作者：
Szczech, Jeannine R.;Higgins, Jeremy M.;Jin, Song
热电材料可用于固态发电和加热/冷却应用。决定热电材料在热电器件中效率的热电材料ZT的性能值对于大多数传统的块状材料来说仍然很低。纳米尺度和纳米结构的热电材料有望增加相对于本体的ZT。本文介绍了热电材料背后的理论，并详细介绍了纳米尺度和纳米结构热电材料中ZT的预测和证明增强。我们讨论了薄膜和超晶格，纳米线和纳米管，以及纳米复合材料，提供了不同家族的纳米复合材料之间的ZT比较。我们对纳米尺度和纳米结构材料中增强ZT的来源提出了一些看法，并为实现高ZT材料的实际应用提出了一些有前途和富有成效的研究方向。
Thermoelectric materials can be used for solid state power generation and heating/cooling applications. The figure of merit of thermoelectric materials, ZT, which determines their efficiency in a thermoelectric device, remains low for most conventional bulk materials. Nanoscale and nanostructured thermoelectric materials are promising for increasing ZT relative to the bulk. This review introduces the theory behind thermoelectric materials and details the predicted and demonstrated enhancements of ZT in nanoscale and nanostructured thermoelectric materials. We discuss thin films and superlattices, nanowires and nanotubes, and nanocomposites, providing a ZT comparison among various families of nanocomposite materials. We provide some perspectives regarding the origin of enhanced ZT in nanoscale and nanostructured materials and suggest some promising and fruitful research directions for achieving high ZT materials for practical applications.