A Composite Photoanode Based on P25/TiO₂ Nanotube Arrays/Flower-Like TiO₂for High-Efficiency Dye-Sensitized Solar Cells

Jing-Hua Hu¹，Sheng-Qiang Tong¹，Ying-Ping Yang^1,2，Jie-Jie Cheng¹，Li Zhao³，Jin-Xia Duan³

1. School of Science, Wuhan University of Technology2. Department of Electrical and Computer Engineering,University of North Carolina at Charlotte3. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Materials Science and Engineering, Hubei University

摘 要：In this work,a three-layer TiO₂ composite film consisting of flower-like TiO₂ （Flo-TiO₂ ）as overlayer,TiO₂ nanotube arrays as interlayer and TiO₂ nanoparticle（P25）as underlayer was fabricated as the photoelectrode of dyesensitized solar cells（DSSCs）.Due to the introduction of Flo-TiO₂ ,the three-layer composite film has strong lightscattering ability.Then,we have investigated and compared the photoelectric conversion properties of DSSCs based on three-layer structure（P25/TNT arrays/Flo-TiO₂ ）photoelectrode and double-layer film（P25/TNT arrays）photoelectrode.It is found that DSSCs based on three-layer structure exhibit a high power conversion efficiency of 6.48%compared with the DSSCs composed of double-layer film（5.11%）.

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