Improved efficiency of dye-sensitized solar cells applied with nanostructured N-F doped TiO₂ electrode

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• 作者：Shuming Yang^a ; ^{smyang2006@163.com} ; Hongbin Xue^a ; Hongjun Wang^a ; Huizhi Kou^b ; Jichao Wang^a ; Guanghui Zhu^a
• 关键词：A. Thin films ; A. Nanostructures ; D. Electrochemical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2012
• 出版时间：July, 2012
• 年：2012
• 卷：73
• 期：7
• 页码：911-916
• 全文大小：482 K

文摘

Dye-sensitized solar cells (DSSCs) were fabricated with N-F-doped TiO₂ electrodes. The XRD pattern of the N-F-doped TiO₂ is almost the same as that of pure TiO₂, showing that N and F doping has little influence on the formation of anatase titania. The influence of dopant N and F on band energetics and photoelectrochemical properties of nanostructured TiO₂ electrodes were investigated. Compared with pure TiO₂ electrodes, the E_fb of N-F-doped TiO₂ electrodes shifted a little in electrolytes containing LiClO₄. However the total trap densities were remarkably decreased as TiO₂ electrodes were doped with N and F. Finally the N-F-doped TiO₂ electrodes were sensitized with N3 and their photoelectrochemical properties were studied. Experimental results showed that the photoelectric conversion efficiency of N3 sensitized N-F-doped TiO₂ electrodes was 8.61 % under irradiation of 100 mW cm^? white light, about 17.1 % higher than that of a pure TiO₂ electrode.