Deposition of nanocrystalline TiO2 films on flexible titanium mesh for use in dye-sensitized solar cell
| Autor: | Po-Hsiang Kuo, 郭博翔 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 The dye-sensitized solar cell (DSSC), which has the features of low cost, flexibility and heat resistance, is one of the emerging technologies for harvesting solar energy. The components of a DSSC structure are comprised mainly of the glass substrate, transparent conductor (indium tin oxide, ITO), semiconductor material (titanium oxide, TiO2), dye, electrolyte, and cathode (platinum, Pt). The alkali-free glass substrate deposited with ITO and TiO2 films is adopted as photovoltaic electrode. On the contrary, the glass deposited with Pt film is served as the photocatalytic electrode. At present, the energy conversion efficiency of TCO glass-based DSSC has exceeded 11%. However, the ITO glass in a DSSC takes up 16-24% of the total cost. In addition, its flexibility is also poor. In this study, an efficient flexible DSSC using titanium mesh for fabricating nanocrystalline TiO2 electrode and counter-electrode were investigated. These TCO-less flexible electrodes are sintered under 550 °C and exhibit high-temperature durability. At first, several treatments against the titanium mesh were carried out for obtaining a protective layer. Then the Ti mesh was immersed into the TiO2 colloid solution and then sintered at 450 ℃ to fabricate the photoanode. The photovoltaic parameters of various DSSCs were discussed through the observations of TiO2 nanoporous thin films. With a illuminating power density of 100 mW/cm2, a flexible DSSC withη=2.19% is obtained. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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