Improved efficiency of dye-sensitized solar cells applied with F-doped TiO₂ electrodes

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• 作者：Shuming Yang^a ; ^{smyang2006@163.com} ; Shupei Guo^a ; Dongli Xu^a ; Hongbin Xue^a ; Huizhi Kou^b ; Jichao Wang^a ; Guanghui Zhu^a
• 关键词：Dye sensitized solar cell ; Fluorine doped titania electrode ; Band energetics ; Trap state ; Photoelectrochemistry
• 刊名：Journal of Fluorine Chemistry
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：150
• 期：Complete
• 页码：78-84
• 全文大小：1510 K

文摘

Dye-sensitized solar cells were fabricated using F-doped TiO₂ electrodes. The X-ray diffraction patterns of the F doped TiO₂ is almost the same as that of pure TiO₂, showing that F has little influence on the formation of anatase titania. The influence of dopant F on band energetics and photoelectrochemical properties of nanostructured TiO₂ electrodes was investigated. Compared with pure TiO₂ electrodes, the E_fb of F-doped TiO₂ electrodes shifted little in electrolytes containing LiClO₄. The total trap densities were remarkably decreased as TiO₂ electrodes were doped with F. Finally the F-doped TiO₂ electrodes were sensitized with Ru[L₂(NCS)₂], L = 2,2¡ä-bipyridine-4,4¡ä-dicarboxylic acid and their photoelectrochemical properties were studied. Experiment results showed that the content of F plays an important role in the photoelectrochemical properties. The highest conversion efficiency of 8.07 % was obtained with F-doped TiO₂ electrodes containing F0.05 (molar ratio) under irradiation of 100 mW cm^?2 white light, about 11.3 % higher than that of pure TiO₂ electrodes.