期刊
CRYSTENGCOMM
卷 15, 期 8, 页码 1651-1656出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce26691a
关键词
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资金
- National Natural Science Foundation of China [50772127, 51172042]
- Cultivation Fund of the Key Scientific and Technical Innovation Project [708039]
- Fundamental Research Funds for the Central Universities
- Shanghai Leading Academic Discipline Project [B603]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Program of Introducing Talents of Discipline to Universities [111-2-04]
Sub-micrometer sized rutile TiO2 nanorod microspheres with diameters of 500-700 nm and with a specific surface area of 63.7 m(2) g(-1) were synthesized via a salt-assisted hydrothermal method. Morphological evolution as a function of reaction time was carried out to gain insight into the formation mechanism of the nanorod microspheres. Unlike traditional bulk rutile TiO2 particles, the nanorod microspheres could provide dual-functions of adsorbing dye molecules and strong light-harvesting efficiency when they were fabricated as a scattering overlayer in dye-sensitized solar cells (DSSCs). Furthermore, the inherent nanorods would provide excellent electron percolation pathways for charge transfer as confirmed by electrochemical impedance spectroscopy. Consequentially, DSSC with the scattering overlayer exhibited a 39% increment of cell efficiency (7.32%) compared with the DSSC without one (5.28%), and the efficiency was also a little higher than the DSSC with the same thickness composed of only nanocrystallites (7.14%).
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