Transition-metal-nitride-based thin films as novel energy harvesting materials.
Transition-metal-nitride-based thin films as novel energy harvesting materials.
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DOI：
10.1039/c5tc03891j
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发表时间：
2016-05-14
期刊：
影响因子：
--
通讯作者：
Alling B
中科院分区：
文献类型：
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作者：
Eklund P;Kerdsongpanya S;Alling B
我们回顾了 ScN 和 CrN 基过渡金属氮化物热电材料的实验和理论研究，与压电材料进行了比较。过去几年，人们对早期过渡金属和稀土氮化物（主要基于 ScN 和 CrN）的兴趣有所增加，用于通过热电和压电收集能量。这是由于许多重要的进展，其中包括发现 (Sc,Al)N 合金中极高的压电耦合系数以及 ScN 基和 CrN 基薄膜的高热电功率因数。这些材料还构成了明确的模型系统，用于研究合金化混合的热力学和纳米结构设计，以优化相稳定性和能带结构。这些特征对热电和压电特性具有影响并可用于定制。在这篇重点文章中，我们回顾了用于热电的 ScN 和 CrN 基过渡金属氮化物，并与压电进行了比较。我们进一步讨论这些材料作为模型系统，用于通过综合理论-实验方法定制热电性能的一般策略。
We review experimental and theoretical research on ScN- and CrN-based transition-metal nitride materials for thermoelectrics, drawing parallels with piezoelectricity. The last few years have seen a rise in the interest in early transition-metal and rare-earth nitrides, primarily based on ScN and CrN, for energy harvesting by thermoelectricity and piezoelectricity. This is because of a number of important advances, among those the discoveries of exceptionally high piezoelectric coupling coefficient in (Sc,Al)N alloys and of high thermoelectric power factors of ScN-based and CrN-based thin films. These materials also constitute well-defined model systems for investigating thermodynamics of mixing for alloying and nanostructural design for optimization of phase stability and band structure. These features have implications for and can be used for tailoring of thermoelectric and piezoelectric properties. In this highlight article, we review the ScN- and CrN-based transition-metal nitrides for thermoelectrics, and drawing parallels with piezoelectricity. We further discuss these materials as a models systems for general strategies for tailoring of thermoelectric properties by integrated theoretical–experimental approaches.