High-temperature thermoelectric properties of Cu2Ga4Te7 with defect zinc-blende structure
High-temperature thermoelectric properties of Cu2Ga4Te7 with defect zinc-blende structure
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DOI：
10.1063/1.3583662
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发表时间：
2011-04-25
影响因子：
4
通讯作者：
Yamanaka, Shinsuke
中科院分区：
文献类型：
--
作者：
Plirdpring, Theerayuth;Kurosaki, Ken;Yamanaka, Shinsuke
在这里，我们展示了具有缺陷锌-闪锌矿结构的Cu2Ga4Te7的高温热电（TE）性能，其中七分之一的阳离子位是结构空位。Cu2Ga4Te7在高温下具有较低的电阻率（rho）和导热系数（kappa）以及中等的正塞贝克系数(S)，是一种很有前途的高性能p型TE材料。在940 K时，S、rho和kappa分别为+215 mu V K-1、10.1 X 10(-5) Omega m和0.67 Wm(-1) K-1，从而得到最大无因次优值ZT （=(ST)-T-2/rho/kappa，其中T为绝对温度）为0.64。(C) 2011年美国物理研究所。(doi: 10.1063/1.3583662)
Here we show the high-temperature thermoelectric (TE) properties of Cu2Ga4Te7 with the defect zinc-blende structure in which one-seventh of the cation sites are structural vacancies. Cu2Ga4Te7 exhibited relatively low electrical resistivity (rho) and thermal conductivity (kappa) and moderate positive Seebeck coefficient (S) at high temperatures, making this compound a promising high-performance p-type TE material. At 940 K, the S, rho, and kappa were +215 mu V K-1, 10.1 X 10(-5) Omega m, and 0.67 Wm(-1) K-1, respectively, which resulted in the maximum dimensionless figure of merit ZT (=(ST)-T-2/rho/kappa, where T is the absolute temperature) of 0.64. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3583662]