Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 35, Pages 15228-15233Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp105780v
Keywords
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Funding
- National Natural Science Foundation of China [20873183, U0934003]
- Natural Science Foundation of Guangdong Province [8151027501000030]
- Open Foundation of the Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education
- Shenzhen Key Laboratory of Special Functional Materials, Shenzhen University, Shenzhen
- Foundation of Sun Yat-Sen University
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The fabrication of highly ordered one-dimensional TiO2 nanotube arrays on transparent conductive glass is of key interest for constructing dye-sensitized solar cells (DSSCs) from the front-side illumination mode. We report the formation of large-scale free-standing TiO2 nanotube arrays via sonication of a TiO2 nanotube on Ti foil prepared by an anodization process, which can be further transferred to the fluorine-doped tin oxide conductive glass via a drop of TiO2 sal containing Ti(OBu)(4) and polyethylene glycol. The photovoltaic performance of DSSCs based on 20.8 mu m length TiO2 nanotube arrays on FTO glass reached 8.07%, which is higher than that of a TiO2 nanoparticle electrode (7.58%) because of the reduced electron combination and efficient light-harvesting efficiency for the former. It is also observed that the power conversion efficiency of DSSCs measured from the front-side illumination mode (8.07%) is higher than that of the back-side illumination mode (7.29%) owing to the light absorption by the iodine electrolyte and light reflection by the Pt counter electrode for the latter.
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