Development of dye-sensitized solar cells based on visible-light-responsive TiO2 thin films with a unique columnar structure
A visible-light-responsive TiO 2 thin film (Vis-TiO 2 ), possessing a unique columnar structure oriented perpendicular to the substrate, has been prepared by using a radio-frequency magnetron sputtering deposition method. The unique TiO 2 thin film was used as a key component of N719 dye-sensitized...
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Veröffentlicht in: | Research on chemical intermediates 2013, Vol.39 (1), p.415-424 |
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Hauptverfasser: | , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A visible-light-responsive TiO
2
thin film (Vis-TiO
2
), possessing a unique columnar structure oriented perpendicular to the substrate, has been prepared by using a radio-frequency magnetron sputtering deposition method. The unique TiO
2
thin film was used as a key component of N719 dye-sensitized solar cells (DSSCs). The rough morphology caused by the columnar structure leads to enhanced photovoltaic performances of these DSSCs as a consequence of increased amounts of adsorbed dyes and facilitated diffusion of the electrolyte into Vis-TiO
2
film. Additionally, photovoltaic performances of the DSSCs were found to depend strongly on the thickness of the Vis-TiO
2
film, which can be readily controlled by adjusting the sputtering time conducted for deposition. Consequently, a solar-to-electric energy conversion efficiency of 2.6 % under AM 1.5 illumination was observed for an optimally performing DSSC that has a Vis-TiO
2
film thickness of 6.9 μm, prepared by employing a sputtering time of 700 min. |
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ISSN: | 0922-6168 1568-5675 |
DOI: | 10.1007/s11164-012-0659-x |