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Labeling co-sensitizer dye for XPS quantification in coadsorption dye-sensitized solar cells

共吸着色素増感太陽電池におけるラベリング増感剤を用いたXPS定量解析

本田 充紀  ; 柳田 真利*; Han, L.*; 宮野 健次郎*

Honda, Mitsunori; Yanagida, Masatoshi*; Han, L.*; Miyano, Kenjiro*

Quantifying the coadsorption of dye molecules on nanoporous TiO$$_{2}$$ is difficult because of the complex adsorption structure between the dye and TiO$$_{2}$$ surface. D131 dye absorbs strongly in the ultraviolet region and is a common co-sensitizer for dye-sensitized solar cells. In this study, we showed that Cl-terminated D131 dye coadsorbed with a Ru complex on nanoporous TiO$$_{2}$$ can be used as a labeling compound to quantify coadsorption systems by X-ray photoelectron spectroscopy (XPS). Cl-terminated D131 alone and Cl-terminated D131 and N719 coadsorbed on nanoporous TiO$$_{2}$$ were measured with XPS. The Cl atoms were quantified by the peak intensity ratio of the Cl 1s and Ti 2p peaks. In the Cl-terminated D131 + N719 coadsorption system, the amount of Cl-terminated D131 dye adsorbed decreased by about 44% for the 1:1 mixture. Our technique could also be used to quantify other dyes in co-sensitizer systems, such as black dye and N3 dye.

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