Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 13, Issue 8, Pages 788-791Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.05.003
Keywords
Dye-sensitized solar cell; Coaxial TiO2/ZnO; Nanotube arrays; Electrochemical deposition
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Funding
- National Natural Science Foundation of China (NSFC) [21073079, J0730425]
- Fundamental Research Funds for the Central Universities, Chunhui Project
- 111 Project
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A novel type of coaxial TiO2/ZnO nanotube arrays has been prepared by electrochemical method. The TiO2/ZnO nanotube arrays can be applied as highly efficient photoanodes in dye-sensitized solar cells (DSSC). Such photoanode benefits from the capability of high sensitizer loading offered by the high specific surface, and the direct conduction path through the aligned nanotubes. Moreover, the heterojunction at the TiO2/ZnO interface favors charge separation and reduces the probability of charge recombination. With the coaxial TiO2/ZnO nanotubes as the photoanode, DSSC with an overall 2.8% energy-conversion efficiency was obtained, which was 40% higher than that using pure TiO2 nanotubes. 2011 Elsevier B.V. All rights reserved.
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