Vectorial electron relay at ITO electrodes modified with self-assembled monolayers of ferrocene-porphyrin-fullerene triads and porphyrin-fullerene dyads for molecular photovoltaic devices

被引:68
作者
Imahori, H [1 ]
Kimura, M
Hosomizu, K
Sato, T
Ahn, TK
Kim, SK
Kim, D
Nishimura, Y
Yamazaki, I
Araki, Y
Ito, O
Fukuzumi, S
机构
[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, PRESTO,Japan Sci & Technol Agcy,Nishikyo Ku, Kyoto 6158510, Japan
[2] Kyoto Univ, Fukui Inst Fundamental Chem, Sakyo Ku, Kyoto 6068103, Japan
[3] Osaka Univ, CREST, Japan Sci & Technol Agcy, Grad Sch Engn,Dept Mat & Life Sci, Suita, Osaka 5650871, Japan
[4] Univ Tsukuba, Dept Chem, Tsukuba, Ibaraki 3058577, Japan
[5] Yonsei Univ, Dept Chem, Ctr Ultrafast Opt Characterist Control, Seoul 120749, South Korea
[6] Seoul Natl Univ, Sch Chem, Seoul 151747, South Korea
[7] Hokkaido Univ, Grad Sch Engn, Dept Mol Chem, Sapporo, Hokkaido 0608628, Japan
[8] Tohoku Univ, CREST, Japan Sci & Technol Agcy, Inst Multidisciplinary Res & Adv Mat, Sendai, Miyagi 9808577, Japan
关键词
donor-acceptor systems; electron transfer; fullerenes; porphyrins; self-assembly;
D O I
10.1002/chem.200400377
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Systematic series of indium tin oxide (ITO) electrodes modified covalently with self-assembled monolayers (SAMs) of ferrocene-porphyrin-fullerene triads and porphyrin-fullerene dyads were designed to gain valuable insight into the development of molecular photovoltaic devices. The structures of SAMS on ITO have been investigated by UV/Vis absorption spectroscopy, atomic force microscopy, and cyclic voltammetry. The photoelectrochemical and photophysical (fluorescence lifetime and time-resolved transient absorption) properties were also determined. The highest quantum yield of photocurrent generation (11%) among donor-acceptor linked systems which are covalently attached to the surface of ITO electrodes was achieved with SAMs of ferrocene-zinc porphyrin-fullerene linked triad on ITO electrodes. The quantum yields of photocurrent generation correlate well with the charge-separation efficiency and the lifetime of the charge-separated state of the porphyrin-fullerene linked systems in solution. These results provide valuable information for the construction of photonic molecular devices and artificial photosynthetic systems on ITO electrodes.
引用
收藏
页码:5111 / 5122
页数:12
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