標題: Porphyrin Dyes with High Injection and Low Recombination for Highly Efficient Mesoscopic Dye-Sensitized Solar Cells
作者: Barea, Eva M.
Gonzalez-Pedro, Victoria
Ripolles-Sanchis, Teresa
Wu, Hui-Ping
Li, Lu-Lin
Yeh, Chen-Yu
Diau, Eric Wei-Guang
Bisquert, Juan
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 2-Jun-2011
摘要: 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.
URI: http://dx.doi.org/10.1021/jp2018378
http://hdl.handle.net/11536/22781
ISSN: 1932-7447
DOI: 10.1021/jp2018378
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 115
Issue: 21
起始頁: 10898
結束頁: 10902
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