期刊
NANO LETTERS
卷 12, 期 2, 页码 1075-1080出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl204346g
关键词
Thermoelectric; hot carrier filtering effect; antimony telluride; solution processed; heterostructure; ligand exchange
类别
资金
- Center for Energy Efficient Materials (CEEM), an Energy Frontier Research Center
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001009]
- MRSEC of the NSF [DMR05-20415, DMR11-21-53]
- Corning Science Foundation
- Alexander von Humboldt foundation
In this work, AgxTey-Sb2Te3 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 (similar to 2 mu W/(cm.K-2)) is obtained at 150 degrees C. This shows the possibility of engineering multiphases to further improve thermoelectric performance beyond phonon scattering through a low-temperature solution processed route.
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