摘要
目前对热电材料的研究,主要通过提高功率因子或降低热导率等途径来提高热电优值.通过对现有材料进行掺杂优化,以及探索纳米材料等方式来提高功率因子;通过固溶合金化,使用低热导率材料及纳米结构改造等方式来降低热导率.提出用优化载流子浓度,优化带隙宽度、修饰材料化学成分等基本物理方法来提高均质材料的热电优值,并介绍了有关热电材料的一些重要理念及当前对热电材料的认知水平.
Current research is aimed at increasing the thermoelectric figure of merit by maximizing the power factor or minimizing the thermal conductivity. Attempts at maximizing the power factor include the development of new materials, optimization of existing materials by doping, and the exploration of nanoscale materials. The minimiza- tion of the thermal conductivity can come through solid-solution alloying, use of materials with intrinsically low ther- mal conductivity, and nanostructuring. The basic physical ideas have been proposed to increase the thermoelectric figure of merit of spatially homogeneous thermoelectric materials, which also include optimizing carrier concentra- tion, optimizing the band gap width and modifying the chemical composition. The key concepts in the field of ther- moelectric materials research are introduced, and the current understanding is presented.
出处
《河南教育学院学报（自然科学版）》
2013年第1期1-6,共6页
Journal of Henan Institute of Education(Natural Science Edition)
基金
国家自然科学基金(11102060)
河南省教育厅自然科学基金资助项目(2011A140006)
关键词
热电材料
功率因子
热导率
热电优值
thermoelectric materials
power factor
thermal conductivity
thermoelectric figure of merit
