Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/86351
標題: Molecular Engineering of Push-Pull Porphyrin Dyes for Highly Efficient Dye-Sensitized Solar Cells: The Role of Benzene Spacers
作者: Yella, Aswani
Mai, Chi-Lun
Zakeeruddin, Shaik M.
Chang, Shu-Nung
Hsieh, Chi-Hung
Yeh, Chen-Yu
Grätzel, Michael
關鍵字: dyes
energy conversion
porphyrinoids
sensitizers
solar cells
摘要: Porphyrins have drawn much attention as sensitizers owing to the large absorption coefficients of their Soret and Q bands in the visible region. In a donor and acceptor zinc porphyrin we applied a new strategy of introducing 2,1,3-benzothiadiazole (BTD) as a π-conjugated linker between the anchoring group and the porphyrin chromophore to broaden the absorption spectra to fill the valley between the Soret and Q bands. With this novel approach, we observed 12.75% power-conversion efficiency under simulated one-sun illumination (AM1.5G, 100 mW cm(-2)). In this study, we showed the importance of introducing the phenyl group as a spacer between the BTD and the zinc porphyrin in achieving high power-conversion efficiencies. Time-resolved fluorescence, transient-photocurrent-decay, and transient-photovoltage-decay measurements were employed to determine the electron-injection dynamics and the lifetime of the photogenerated charge carriers.
URI: http://hdl.handle.net/11455/86351
ISSN: 14337851
1521-3773
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