Defect modulation on CaZn1-xAg1-ySb (0
Defect modulation on CaZn1-xAg1-ySb (0
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CaZn1-xAg1-ySb 上的缺陷调制 (0
DOI：
10.1039/c8ta04001j
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发表时间：
2018
影响因子：
11.9
通讯作者：
Xia Sheng Qing
中科院分区：
文献类型：
--
作者：
Zhu Min;Wu Zhen;Liu Qian;Zhu Tie Jun;Zhao Xin Bing;Huang BaiBiao;Tao Xutang;Xia Sheng Qing
在应用温度范围内具有高平均品质因数（zT）的热电材料对于发电应用至关重要。在本报告中，发现了一个新的Zintl系列，CaZn 1 − xAg 1 −ySb（0 < x < 1; 0 < y < 1），并仔细研究了它们的热电势。这些相具有独特的阴离子层，具有广泛的Zn/Ag缺陷。这种特性确保了非常低的固有导热率，同时确保了相应材料的相当高的导电率。对于优化的成分CaZn0.4Ag0.18Sb，证明了良好的热电性能，在800至1100 K范围内观察到宽的高zT平台（zT 1.0）。这一新的Zintl系列的发现不仅为我们探索高zT材料提供了宝贵的资源，而且也为基于缺陷调制的此类热电器件的设计提供了一些新的思路。
Thermoelectric materials with high average figure of merit (zT) over the applied temperature range are crucial for power generation applications. In this report, a new Zintl series, CaZn1−xAg1−ySb (0 < x < 1; 0 < y < 1), was discovered and carefully investigated for their thermoelectric potential. These phases feature unique anionic layers with extensive Zn/Ag defects. Such a characteristic ensures very low intrinsic thermal conductivity and meanwhile considerably high electrical conductivity for the corresponding materials. For an optimized composition CaZn0.4Ag0.18Sb, decent thermoelectric performance was proved with a broad high zT plateau (zT ∼ 1.0) observed from 800 to 1100 K. The discovery of this new Zintl series not only provides us a valuable resource for exploring high zT materials, but also sheds some new light on the design of such thermoelectrics on the basis of defect modulation.