California Institute of Technology裴艳中博士报告会

报告题目：PbTe-based nanocomposites as high performance thermoelectric materials

时 间：2010年6月10日上午9：00

地 点：中国科学院宁波材料技术与工程研究所A5会议室

Abstract: Thermoelectric PbTe compound with homogeneous nano sized Ag2Te particles were synthesized, according to the equilibrium phase diagram. The feature of intrinsic semiconducting behavior enables the direct determination of lattice thermal conductivity (kL), and the direct demonstration of kL-reduction due to the nano scattering. The capability of independent control on carrier concentration, finally results in a thermoelectric figure of merit ZT>1.5 in both n-type La-doped and p-type Na-doped PbTe-based materials. The obtained kL is approaching the amorphous limit. Carrier concentration gradient behavior in Ag-doped PbTe/Ag2Te composites successfully enhances the thermoelectric efficiency by ~50%. This strategy has also been applied to other material systems and a new thermoelectric material system with high ZT (~1.0) has been proposed.

报告人简历：裴艳中2003年毕业于中南大学无机非金属材料专业，并于2008年获得中国科学院上海硅酸盐研究所工学博士学位。随后赴美国密西根州立大学及加州理工学院从事博士后研究至今。裴艳中博士多年来一直致力于热电能源转换材料的研究，并在该领域内取得了丰硕的成果，得到了业内的高度认可。曾为国内首位青年学者被授予国际热电学会颁发的Goldsmid Award。其论文中有一篇被选为2006年度国际热电学会最佳论文"Best Paper"。裴艳中博士目前的研究兴趣主要集中在高性能纳米复合碲化铅基（PbTe）热电能源转换材料及锑化钴基笼状结构化合物。

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