Bi2Te3热电材料改性研究及其进展

随着全球经济对高效、无污染能源转换的强劲需求,Bi2Te3半导体作为最优异的室温热电材料取得了长足稳步的发展。本文在简述Bi2Te3热电材料的结构和性能的基础上,重点介绍了掺杂、纳米化、掺杂与纳米化相结合的方法对Bi2Te3热电性能的影响,详细分析了其影响机制。结果表明,以上方法均能很大程度上提升Bi2Te3热电材料的热电性能,尤其是掺杂与纳米化相结合对热电性能的提高更为显著。最后,对Bi2Te3热电材料改性的研究方向进行了展望。

Research progress on modification of Bi2Te3 thermoelectric materials

With the strong demand of efficient and pollution-free energy conversion in the global economy, Bi2Te3 semiconductors, as the most excellent room temperature thermoelectric material, have achieved steady development. In this paper, after brief introduction to the structure and properties of Bi2Te3 thermoelectric materials, the effects of doping and nanostructuring and their combination on the thermoelectric properties of Bi2Te3 materials are emphatically introduced with detailly analyzed reasons.The results show that the thermoelectric properties of Bi2Te3 materials can be greatly improved by these method. In particular, most significant improvement can be achieved on the thermoelectric properties by the combination of doping and nanostructuring. Finally, the directions of modification research of Bi2Te3 thermoelectric materials are prospected.