Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar Cells
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Scholar |
Otros documentos de la autoría: Barea, Eva M; González Pedro, Victoria; Ripollés Sanchis, Teresa; Wu, Hui-Ping; Li, Lu-Lin; Yeh, Chen-Yu; Wei-Guang Diau, Eric; Bisquert, Juan
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http://dx.doi.org/10.1021/jp2018378 |
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Título
Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar CellsAutoría
Fecha de publicación
2011-05Editor
ACSISSN
1932-7447Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/full/10.1021/jp2018378Versión
info:eu-repo/semantics/publishedVersionResumen
The photovoltaic performance and charge recombination characteristics of porphyrin-based dye-sensitized solar cell (DSC) devices have been investigated using the impedance spectroscopy (IS) technique. The IS results ... [+]
The photovoltaic performance and charge recombination characteristics of porphyrin-based dye-sensitized solar cell (DSC) devices have been investigated using the impedance spectroscopy (IS) technique. The IS results provide key information related to the device performance for a highly efficient porphyrin dye (YD2), a reference porphyrin dye (YD0), and a commercial ruthenium dye (N719). The DSC devices constructed using YD2 and N719 dyes reach similar internal power conversion efficiencies (7.41% vs 7.54%) due to the higher injection of the YD2 dye that is compromised by a lower photovoltage. In addition, both YD2 and N719 dyes exhibit the same charge-transfer resistance, indicating that the recombination rates of both dyes are very similar. The diarylamino group plays a key role to repel the triiodide ions from the titania surface so that the charge recombination of YD2 is less significant compared with that of YD0. [-]
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Journal of Physical Chemistry C, 2011, 115 (21)Derechos de acceso
Copyright © 2011 American Chemical Society
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