Sb2Te3 厚膜中基于银的金属间化合物异质结构，具有增强的热电功率因子。

Silver-based intermetallic heterostructures in Sb2Te3 thick films with enhanced thermoelectric power factors.

机构信息

Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, USA.

出版信息

Nano Lett. 2012 Feb 8;12(2):1075-80. doi: 10.1021/nl204346g. Epub 2012 Jan 11.

DOI:10.1021/nl204346g

Abstract

In this work, Ag(x)Te(y)-Sb(2)Te(3) heterostructured films are prepared by ligand exchange using hydrazine soluble metal chalcogenide. Because of the created interfacial barrier, cold carriers are more strongly scattered than hot ones and thereby an over 50% enhanced thermoelectric power factor (~2 μW/(cm·K(2))) is obtained at 150 °C. This shows the possibility of engineering multiphases to further improve thermoelectric performance beyond phonon scattering through a low-temperature solution processed route.

摘要

在这项工作中，通过使用肼溶性金属硫族化物进行配体交换，制备了 Ag(x)Te(y)-Sb(2)Te(3) 异质结构薄膜。由于界面势垒的产生，冷载流子比热载流子受到更强的散射，从而在 150°C 时获得了超过 50%的增强热电功率因子（~2 μW/（cm·K(2)））。这表明通过低温溶液处理途径，通过声子散射来进一步改善热电性能，有可能通过工程多相来实现。