色素増感型太陽電池用Nb_2O_5系複合体電極

概要

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Various semiconducting oxides are examined as alternative electrode materials for dye-sensitized solar cells. It was confirmed that Nb_2O_5-based electrodes exhibit a higher open-circuit voltage and fill factor, compared to TiO_2-based electrodes. It was also found that a mixing of oxides, with a higher flat-band potential level such as SrTiO_3, Ta_2O_5, and ZrO_2, with Nb_2O_5 led to a higher open-circuit voltage. By mixing Nb_2O_5 with TiO_2 in different ratios, it was revealed that these oxides form no chemical reaction products after a low-temperature heat treatment and a highest power output of the cells with the composite electrodes was obtained at Nb_2O_5:TiO_2=8:2 in mass. The power output with this composite electrode was higher than that with pure Nb_2O_5 or with pure TiO_2. The Nb_2O_5-TiO_2 composite electrode, in which the Nb_2O_5 particles are dispersed on the TiO_2 surfaces, exhibits high photoelectrochemical performance.
社団法人日本セラミックス協会の論文
2000-12-01