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Fabrication of dye-sensitized solar cells using TiO2-nanotube arrays on Ti-grid substrates |
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| Authors: | KY Chun YM Sung YT Hyun |
| Affiliation: | a Department of Materials Engineering, Kyungsung University, Busan, 608-736, Republic of Korea b Department of Electrical Engineering, Kyungsung University, Busan, 608-736, Republic of Korea c Future Technology, Korea Institute of Machinery and Materials, Changwon, 641-010 Republic of Korea |
| Abstract: | Self-aligned TiO2 nanotube arrays (20 μm in length) were fabricated by anodic oxidation of Ti-grid with a thickness of 100 μm in an ethylene glycol electrolyte with an addition of H2O (1.5 vol.%) and NH4F (0.2 wt.%). Voltage applied between Ti and Pt cathodes is 60 V at ~ 22 °C. Dye-sensitized solar cell utilizing photoanode structure of TiO2-nanotube/Ti-grid was fabricated with no transparent conducting oxide (TCO) layer, in which Ti-grid replaces TCO. Overall photoconversion efficiency is very low (< 0.5%) due to the large pore size (100 nm in diameter) of the nanotubes, which may cause insufficient dye molecules to be attached, thus limiting light harvesting. |
| Keywords: | Anodic oxidation TiO2-nanotube Photoanode Dye-sensitized solar cells |
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