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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Ru-based donor-acceptor photosensitizer that retards charge recombination in a p-type dye-sensitized solar cell
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Ru-based donor-acceptor photosensitizer that retards charge recombination in a p-type dye-sensitized solar cell

机译:钌基供体-受体光敏剂,可延缓p型染料敏化太阳能电池中的电荷重组

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摘要

We report on the synthesis and characterization of a donor-acceptor ruthenium polypyridyl complex as a photosensitizer for p-type dye-sensitized solar cells (DSSCs). The electrochemical, photophysical, and photovoltaic performance of two ruthenium-based photosensitizers were tested in NiO-based DSSCs; bis-(2,2′-bipyridine-4,4′-dicarboxylic acid) 2N-(1,10-phenanthroline)-4-nitronaphthalene-1,8-dicarboximide ruthenium(ii), ([Ru(dcb)_2(NMI-phen)](PF_6)_2) and tris-(2,2′-bipyridine-4,4′-dicarboxylic acid) 3 ruthenium(ii), [(Ru(dcb)_3)Cl_2]. The presence of an electron-accepting group, 4-nitronaphthalene-1,8-dicarboximide (NMI), attached to the phenanthroline of [Ru(dcb)_2(NMI-phen)]~(2+) resulted in long-lived charge separation between reduced [Ru(dcb)_2(NMI-phen)]~(2+) and NiO valence band holes; 10-50 μs. In the reduced state for [Ru(dcb)_2(NMI-phen)]~(2+), the electron localized on the distal NMI group. In tests with I_3 ~-/I~- and Co(4,4′-di-tert-butyl-bipyridine)_3~(2+/3+) electrolytes, [Ru(dcb)_2(NMI-phen)]~(2+) outperformed [Ru(dcb)_3]~(2+) in solar cell efficiency in devices. A record APCE (25%) was achieved for a ruthenium photosensitizer in a p-type DSSC. Insights on photosensitizer regeneration kinetics are included.
机译:我们报告了供体-受体钌聚吡啶基配合物作为p型染料敏化太阳能电池(DSSCs)的光敏剂的合成和表征。在基于NiO的DSSC中测试了两种基于钌的光敏剂的电化学,光物理和光伏性能。双-(2,2'-联吡啶-4,4'-二羧酸)2N-(1,10-菲咯啉)-4-硝基萘-1,8-二苯甲酰亚胺钌(ii),([[Ru(dcb)_2( NMI-phen)](PF_6)_2)和三-(2,2'-联吡啶-4,4'-二羧酸)3钌(ii),[(Ru(dcb)_3)Cl_2]。与[Ru(dcb)_2(NMI-phen)]〜(2+)的邻菲咯啉连接的电子接受基团4-硝基萘-1,8-二甲酰亚胺(NMI)的存在可导致长寿命电荷还原的[Ru(dcb)_2(NMI-phen)]〜(2+)与NiO价带孔之间的分离; 10-50μs。在[Ru(dcb)_2(NMI-phen)]〜(2+)的还原态下,电子位于远端NMI组上。在使用I_3〜-/ I〜-和Co(4,4'-二叔丁基联吡啶)_3〜(2 + / 3 +)电解质的测试中,[Ru(dcb)_2(NMI-phen)]〜 (2+)在装置中的太阳能电池效率上胜过[Ru(dcb)_3]〜(2+)。在p型DSSC中,钌光敏剂的APCE达到创纪录的25%。包括对光敏剂再生动力学的见解。

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