Photoinduced Charge Carrier Dynamics of Zn-Porphyrin-TiO2 Electrodes: The Key Role of Charge Recombination for Solar Cell Performance

被引：205

作者：

Imahori, Hiroshi ^{[1
,2
,3
]}

Kang, Soonchul ^{[1
,2
]}

Hayashi, Hironobu ^{[2
]}

Haruta, Mitsutaka ^{[4
]}

Kurata, Hiroki ^{[4
]}

Isoda, Seiji ^{[4
]}

Canton, Sophie E. ^{[5
]}

Infahsaeng, Yingyot ^{[5
]}

Kathiravan, Arunkumar ^{[5
]}

Pascher, Torbjorn ^{[5
]}

Chabera, Pavel ^{[5
]}

Yartsev, Arkady P. ^{[5
]}

Sundstrom, Villy ^{[5
]}

机构：

[1] Kyoto Univ, Inst Integrated Cell Mat Sci iCeMS, Nishikyo Ku, Kyoto 6158510, Japan

[2] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Nishikyo Ku, Kyoto 6158510, Japan

[3] Kyoto Univ, Fukui Inst Fundamental Chem, Sakyo Ku, Kyoto 6068103, Japan

[4] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[5] Lund Univ, Dept Chem Phys, SE-22100 Lund, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2011年 / 115卷 / 16期

关键词：

NANOCRYSTALLINE TIO2 FILMS; EXCITED-STATE DYNAMICS; RU-DYE MOLECULES; TITANIUM-DIOXIDE FILMS; PHOTOELECTROCHEMICAL PROPERTIES; PHOTOVOLTAIC PROPERTIES; POLYPYRIDYL COMPLEXES; THIN-FILMS; INJECTION; PORPHYRIN;

D O I：

10.1021/jp103747t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Time resolved absorption spectroscopy has been used to study photoinduced electron injection and charge recombination in Zn-porphyrin sensitized nanostructured TiO2 electrodes. The electron transfer dynamics is correlated to the performance of dye sensitized solar cells based on the same electrodes. We find that the dye/semiconductor binding can be described with a heterogeneous geometry where the Zn-porphyrin molecules are attached to the TiO2 surface with a distribution of tilt angles. The binding angle determines the porphyrin semiconductor electron transfer distance and charge transfer Occurs through space, rather than through lie bridge connecting the porphyrin to the surface. For short sensitization times, (1 h), there is a direct correlation between solar cell efficiency and amplitude Of the kinetic component due to long-lived conduction band electrons, once variations in light harvesting (surface coverage) have been taken into account Long sensitization time (12 h) results in decreased solar cell efficiency because of decreased efficiency of electron injection.

引用

页码：3679 / 3690

页数：12

共 80 条

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