Review of BiCuSeO-based Thermoelectric Materials for Thermoelectric Generation
FENG Bo1,2, LI Guangqiang1,2, ZHANG Chengcheng1,2, LI Yawei1,2, HE Zhu1,2, FAN Xi’an1,2
1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081; 2 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081
Abstract: BiCuSeO based thermoelectric material with low thermal conductivity, high Seebeck coefficients and excellent thermoelectric properties, rich raw material storage, safety and non-toxicity, are considered to be a novel thermoelectric conversion material with the potential application. We first introduced the basic characteristics of BiCuSeO based compounds such as the crystal structure, electronic structure and thermoelectric properties, then analyzed the preparation methods, and reviewed the means of improving their thermoelectric properties including the doping of low-valance elements such as Na, Ag, Mg, Ca, Sr, Ba, Cu deficiencies, dual vacancies, band gap tuning, grain refinement, texturing and modulation doping etc. The highest ZT value has been increased from ~0.4 to 1.5 by the co-regulation of the electric-thermal transport characteristics. Finally, the research direction for further improvement of the thermoelectric properties of BiCuSeO based materials is summarized.
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