High-efficiency dye-sensitized solar cell based on a nitrogen-doped nanostructured titania electrode |
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Authors: | Ma Tingli Akiyama Morito Abe Eiichi Imai Isao |
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Affiliation: | National Institute of Advanced Industrial Science and Technology (AIST), AIST Kyushu, Shuku 807-1, Tosu, Saga 841-0052, Japan. tingli-ma@chem.rc.kyushu-u.ac.jp |
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Abstract: | A highly efficient dye-sensitized solar cell (DSC) was fabricated using a nanocrystalline nitrogen-doped titania electrode. The properties of the nitrogen-doped titania powder, film, and solar cell were investigated. The substitution of oxygen sites with nitrogen atoms in the titania structure was confirmed by X-ray photoemission spectroscopy (XPS). The UV-vis spectrum of the nitrogen-doped powder and film showed a visible light absorption in the wavelength range from 400 to 535 nm. An enhancement of the incident photon-to-current conversion efficiency (IPCE) in the range of 380-520 nm and 550-750 nm was observed. An 8% overall conversion efficiency has been achieved. The results of the stability test indicated that the solar cell fabricated by the nitrogen-doped titania exhibited great stability. |
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