An alternative efficient redox couple for the dye-sensitized solar cell system
An alternative efficient redox couple for the dye-sensitized solar cell system
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DOI：
10.1002/chem.200204577
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发表时间：
2003-08-18
影响因子：
4.3
通讯作者：
Grätzel, M
中科院分区：
文献类型：
--
作者：
Nusbaumer, H;Zakeeruddin, SM;Grätzel, M
合成了一系列新型钴配合物[Co(LLL)(2)X-2]，并对其作为染料敏化纳米晶TiO2太阳能电池的氧化还原介体进行了评估。研究发现配体的结构和抗衡离子的性质会影响光伏性能。单电子转移氧化还原介体[Co(dbbiP)(2)](ClO4)(2) (dbbip = 2,6-双(1'-丁基苯并咪唑-2'-基)吡啶)在所研究的化合物中表现最好。包含这种氧化还原介体的光伏电池的入射光子到电流的转换效率 (IPCE) 高达 80%。在模拟AM1.5太阳光下，100 W m(-2)强度下光电转换总产率达到8%，1000 W m(-2)强度下光电转换总产率超过4%。涂有 2 微米厚的纳米多孔层和 4 微米厚的光散射层并用疏水性钌染料敏化的光电极给出了最好的结果。
A series of new cobalt complexes [Co(LLL)(2)X-2] were synthesized and evaluated as redox mediators for dye-sensitized nanocrystalline TiO2 Solar cells. The structure of the ligand and the nature of the counterions were found to influence the photovoltaic performance. The one-electron-transfer redox mediator [Co(dbbiP)(2)](ClO4)(2) (dbbip = 2,6- bis(1'-butylbenzimidazol-2'-yl)pyridine) performed best among the compounds investigated. Photovoltaic cells incorporating this redox mediator yielded incident photon-to-current conversion efficiencies (IPCE) of up to 80%. The overall yield of light-to-electric power conversion reached 8 % under simulated AM1.5 sunlight at 100 W m(-2) intensity and more than 4 % at 1000 W m(-2). Photoelectrodes coated with a 2 mum thick nanoporous layer and a 4 mum thick light-scattering layer, sensitized with a hydrophobic ruthenium dye, gave the best results.