Electron injection and recombination in dye sensitized nanocrystalline titanium dioxide films: A comparison of ruthenium bipyridyl and porphyrin sensitizer dyes
Electron injection and recombination in dye sensitized nanocrystalline titanium dioxide films: A comparison of ruthenium bipyridyl and porphyrin sensitizer dyes
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DOI：
10.1021/jp992774b
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发表时间：
2000-01
影响因子：
3.3
通讯作者：
Y. Tachibana;S. Haque;I. Mercer;J. Durrant;D. Klug
中科院分区：
文献类型：
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作者：
Y. Tachibana;S. Haque;I. Mercer;J. Durrant;D. Klug
本文研究了不同敏化剂染料吸附在纳米二氧化钛薄膜上的界面电子传递动力学及其敏化效率的影响因素。我们考虑了三种增敏染料：Ru（2,2 ' -联吡啶-4,4 ' -二羧酸酯）2-顺式-(NCS)2 (Ru（dcbpy)2(NCS)2）和锌和游离碱四羧基苯基卟啉（ZnTCPP和H2TCPP）。选择这些染料是因为它们在氧化电位和光物理性质上有很大的差异，同时保留了与TiO2表面结合的相似羧酸基团。例如，Ru(dcbpy)2(NCS)2在溶液中的光物理以超快(1ns) π*单重态激发态和弱单重态/三重态混合为主。基态氧化电位和激发态氧化电位的差异也高达…
This paper is concerned with the parameters influencing the interfacial electron transfer kinetics, and therefore the sensitizing efficiency, for different sensitizer dyes adsorbed to nanocrystalline titanium dioxide films. We consider three sensitizer dyes: Ru(2,2‘-bipyridyl-4,4‘-dicarboxylate)2-cis-(NCS)2 (Ru(dcbpy)2(NCS)2) and zinc and free base tetracarboxyphenyl porphyrins (ZnTCPP & H2TCPP). These dyes were selected as they exhibit large differences in their oxidation potentials and photophysics, while retaining similar carboxylate groups for binding to the TiO2 surface. For example, whereas the photophysics of Ru(dcbpy)2(NCS)2 in solution is dominated by ultrafast ( 1 ns) π* singlet excited states and only weak singlet/triplet mixing. The ground and excited-state oxidation potentials also differ by up to ...