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Zhiyuan Liu 《中国物理 B》2022,31(10):107303-107303
The binary CoSb3 skutterudite thermoelectric material has high thermal conductivity due to the covalent bond between Co and Sb, and the thermoelectric figure of merit, ZT, is very low. The thermal conductivity of CoSb3 materials can be significantly reduced through phonon engineering, such as low-dimensional structure, the introduction of nano second phases, nanointerfaces or nanopores, which greatly improves their ZT values. The phonon engineering can optimize significantly the thermal transport properties of CoSb3-based materials. However, the improvement of the electronic transport properties is not obvious, or even worse. Energy band and charge-carrier engineering can significantly improve the electronic transport properties of CoSb3-based materials while optimizing the thermal transport properties. Therefore, the decoupling of thermal and electronic transport properties of CoSb3-based materials can be realized by energy band and charge-carrier engineering. This review summarizes some methods of optimizing synergistically the electronic and thermal transport properties of CoSb3 materials through the energy band and charge-carrier engineering strategies. Energy band engineering strategies include band convergence or resonant energy levels caused by doping/filling. The charge-carrier engineering strategy includes the optimization of carrier concentration and mobility caused by doping/filling, forming modulation doped structures or introducing nano second phase. These strategies are effective means to improve performance of thermoelectric materials and provide new research ideas of development of high-efficiency thermoelectric materials. 相似文献
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“大部分标准在没有专利或者专利很少的情况下,由政府领导的行业协会推出,标准本身的政府行为就导致了标准市场化出路的狭小,面临市场大门时无法‘破门’。” 相似文献
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用友最近有点“急”了。堂堂的上市公司,“撒出”各路人马,总裁、副总裁、总监、副总监四处登台演讲,对ERP市场“普及期”纷纷“布道”。 相似文献
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