Solvatochromic Dye Sensitized Nanocrystalline Solar Cells
Solvatochromic Dye Sensitized Nanocrystalline Solar Cells
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溶剂致变色染料敏化纳米晶太阳能电池
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
G. Meyer
中科院分区：
文献类型：
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作者：
R. Argazzi;C. Bignozzi;Mei Yang;G. Hasselmann;G. Meyer
合成了TBA 4 [Ru（CN）4（dcb）]，其中TBA为四丁基铵，dcb为4，4 '-（CO2-）2- 2，2'-联吡啶，并将其附着在光学透明的纳米TiO 2薄膜上，简称[Ru（CN）4（dcb）]/TiO 2.发现金属-配体电荷转移（MLCT）吸收和发射带随溶剂的波长发生变化。TBA 4 [Ru（CN）4（dcb）]和[Ru（CN）4（dcb）]/TiO 2的低能MLCT带的最大吸收分别在乙腈中的517 nm和二甲基甲酰胺中的535 nm处。TBA 4 [Ru（CN）4（dcb）]在乙腈中的脉冲光激发产生长寿命发射MLCT激发态，τ = 30 ns。[Ru（CN）4（dcb）]/TiO 2的脉冲光激发产生归因于界面电荷分离态[RuIII（CN）4（dcb）]/TiO 2（e-）的吸收差光谱。该状态在10 ns内形成，并在毫秒内干净地返回到基态产物。制备了[Ru（CN）4（dcb）]/TiO 2可再生太阳能电池。
The coordination compound TBA4[Ru(CN)4(dcb)], where TBA is tetrabutylammonium and dcb is 4,4‘-(CO2-)2-2,2‘-bipyridine, was synthesized and attached to optically transparent nanocrystalline (anatase) TiO2 films, abbreviated [Ru(CN)4(dcb)]/TiO2. The metal-to-ligand-charge-transfer (MLCT) absorption and emission bands were found to shift in wavelength with solvent. The absorption maximum of the low energy MLCT band was observed at 517 nm in acetonitrile and 535 nm in dimethylformamide for TBA4[Ru(CN)4(dcb)] and at 470 and 500 for [Ru(CN)4(dcb)]/TiO2, respectively. Pulsed light excitation of TBA4[Ru(CN)4(dcb)] in acetonitrile produces a long-lived emissive MLCT excited state, τ = 30 ns. Pulsed light excitation of [Ru(CN)4(dcb)]/TiO2 yields an absorption difference spectrum attributed to an interfacial charge separated state, [RuIII(CN)4(dcb)]/TiO2(e-). This state forms within 10 ns and returns cleanly to ground-state product within milliseconds. Regenerative solar cells based on [Ru(CN)4(dcb)]/TiO2 were prepa...