期刊
NANOTECHNOLOGY
卷 23, 期 48, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/48/485401
关键词
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资金
- Natural Science Foundation of China [51102176, 50972102, 50902103]
- National High-tech R&D Program of China [2009AA03Z301]
- Research Fund for the Doctoral Program of Higher Education of China [20100032120021]
- Natural Science Foundation of Tianjin City [11JCYBJC02000, 09JCZDJC22600]
- Seed Foundation of Tianjin University
Coaxial nanorods with a single-crystalline core and nanocrystal sensitizer shell are a promising nanostructure to enhance the performance of semiconductor sensitized solar cells. Herein, we report the fabrication of coaxial nanorods by depositing n-type CdS and p-type CdTe nanocrystals sequentially on ZnO nanorods. We find that p-type CdTe nanocrystals can work jointly with n-type CdS nanocrystals to enhance the photocurrent and voltage, achieving a conversion efficiency more than three times that of pure ZnO/CdS nanorods. Electrochemical impedance spectroscopy characterization suggests that the stepwise band structure of ZnO/CdS/CdTe is conducive to improving charge separation and extending the electron diffusion length, finally contributing to a high conversion efficiency.
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