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標題: Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar Cells
作者: Barea, E.M.
Gonzalez-Pedro, V.
Ripolles-Sanchis, T.
Wu, H.P.
Li, L.L.
Yeh, C.Y.
Diau, E.W.G.
Bisquert, J.
Project: Journal of Physical Chemistry C
期刊/報告no:: Journal of Physical Chemistry C, Volume 115, Issue 21, Page(s) 10898-10902.
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.
ISSN: 1932-7447
DOI: 10.1021/jp2018378
Appears in Collections:化學系所

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