Electrical and thermal transports of binary copper sulfides CuxS with x from 1.8 to 1.96
Electrical and thermal transports of binary copper sulfides CuxS with x from 1.8 to 1.96
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DOI：
10.1063/1.4953439
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发表时间：
2016-10-01
期刊：
影响因子：
6.1
通讯作者：
Chen, Lidong
中科院分区：
文献类型：
--
作者：
Qiu, Pengfei;Zhu, Yaqin;Chen, Lidong
本研究合成了一系列x为1.8~1.96的CuxS硫化物，并对其晶体结构、元素价态和热电性能进行了系统的研究。铜在CuxS中的价态不随铜/S比的变化而变化，而热电性能对铜的缺乏非常敏感。此外，硫在晶体结构中的排列类型也对电输运起着重要作用。最后，确定了具有较高功率因数和热电优值的二元CuxS体系中最佳的铜/S原子比。(C)2016年作者(S)。
In this study, a series of copper sulfides CuxS with x spanning from 1.8 to 1.96 was prepared and their crystal structures, elemental valence states, and thermoelectric properties were systematically studied. The valence state of Cu in CuxS is unchanged as the ratio of Cu/S varies, while the thermoelectric properties are very sensitive to the deficiency of Cu. In addition, the type of sulfur arrangement in the crystal structure also plays an important role on the electrical transports. Finally, the optimum Cu/S atomic ratios in the binary CuxS system were identified for high power factor and thermoelectric figure of merit. (C) 2016 Author(s).