Thermoelectric properties of quaternary (Bi,Sb)₂(Te,Se)₃ compound

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• 作者：Pengfei Lu ; Yiluan Li ; Chengjie Wu ; Zhongyuan Yu ; Huawei Cao ; Xianlong Zhang ; Ningning Cai ; Xuxia Zhong ; Shumin Wang
• 关键词：Electronic structure ; Thermoelectric properties ; Figure of merit
• 刊名：Journal of Alloys and Compounds
• 出版年：25 January, 2014
• 年：2014
• 卷：584
• 期：Complete
• 页码：13-18
• 全文大小：2494 K

文摘

The quaternary (Bi,Sb)₂(Te,Se)₃ compounds are investigated using first-principles study and Boltzmann transport theory. The energy band structure and density of states are studied in detail. The electronic transport coefficients are then calculated as a function of chemical potential. The figure of merit ZT is obtained assuming a constant relaxation time and an averaged thermal conductivity. Our theoretical result agrees well with previous experimental data.