期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 8, 期 12, 页码 3085-3090出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201300707
关键词
electrochemistry; layered compounds; nanostructures; porous materials; solar cells
资金
- Key Program Projects of the National Natural Science Foundation of China [21031001]
- National Natural Science Foundation of China [91122018, 21101060, 51102082, 51272070]
- Cultivation Fund of the Key Scientific and Technical Innovation Project of the Ministry of Education of China [708029]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20112301110002, 20112301120002]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-11-0959]
Herein, with the purpose of improving the efficiency of p-type dye-sensitized solar cells (DSSCs), a new layered photocathode (LP) is fabricated from irregular overlapping wrinkled porous NiO nanosheets. The LP was sensitized by using a commonly used dye, coumarin 343(C343), and then assembled into p-type DSSCs through coupling with a platinum photoanode. Photoelectochemical characterization showed that the LP cell exhibited a clearly enhanced power-conversion efficiency (by a factor of 4) compared with a cell with a NiO-nanoparticle photocathode (NP). This excellent performance could be attributed to the overlapping layered structure, which favored hole transport, as confirmed by electrochemical impedance spectroscopy, and to the large surface area of the porous NiO nanosheets, which were favorable for dye adsorption.
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