Nanostructured photoelectrode consisting of TiO2 hollow spheres for non-volatile electrolyte-based dye-sensitized solar cells |
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Authors: | Jong Hyuk Park Raehyun Kim Junkyung Kim |
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Affiliation: | a Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea b Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Republic of Korea c Solar Cell Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea |
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Abstract: | A photoelectrode consisting of titania hollow spheres for dye-sensitized solar cells (DSSCs) is prepared by a paste method and the effect of the nanostructure on the performance of DSSCs with non-volatile electrolytes is investigated. The structure of the hollow sphere (HS) electrode with a large pore size and a high porosity allows highly viscous non-volatile electrolytes to penetrate the electrode thoroughly. Furthermore, its outstanding light-harvesting efficiency and long electron diffusion length make the efficiency of the DSSCs with the HS electrode comparable with those of a conventional nanocrystalline electrode, in spite of the smaller amount of the adsorbed dye, when oligomer electrolytes are used. The results show that the structure of a photoelectrode highly improves the performance of the device and the HS electrode is an effective structure for the use of non-volatile electrolytes in DSSCs. |
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Keywords: | Dye-sensitized solar cell Hollow sphere Non-volatile electrolyte Light-harvesting Electron diffusion |
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