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
Hauptverfasser: Toyao, Takashi, Minakata, Masayuki, Iyatani, Kazushi, Ebrahimi, Afshin, Chen, Po-Chou, Tsai, Chung-Bo, Horiuchi, Yu, Matsuoka, Masaya, Anpo, Masakazu
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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.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-012-0659-x