Efficient Copper Mediators Based on Bulky Asymmetric Phenanthrolines for DSSCs
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- 作者：Alessia Colombo ; Claudia Dragonetti ; Mirko Magni ; Dominique Roberto ; Francesco Demartin ; Stefano Caramori ; Carlo A. Bignozzi
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：August 27, 2014
- 年：2014
- 卷：6
- 期：16
- 页码：13945-13955
- 全文大小：553K
- ISSN：1944-8252
文摘
In the context of the development of new electron mediators for dye-sensitized solar cells that could efficiently substitute the more common I3鈥?/sup>/I鈥?/sup> redox couple, we have prepared a series of Cu(I)- phenanthroline complexes through an easy synthetic route. The novel [Cu(2-mesityl-4,7-dimethyl-1,10-phenanthroline)2]PF6 (3) is of particular interest because the presence of the bulky mesityl groups protects as a kiss lock the Cu center, leading to superior dye regeneration kinetics with respect to simpler phenanthroline-based Cu(I) complexes and to a lower dark current with respect the I3鈥?/sup>/I鈥?/sup>. The exploitation of a dual-component electrolyte constituted by (3) and a Fe(II) comediator, in combination with the [Ru(4,4鈥?dicarboxy-2,2鈥?bipyridine)2(4,4鈥?dinonyl-2,2鈥?bipyridine)](PF6)2 sensitizer, allowed us to increase the performance of the cell, reaching Jsc values of 4.0 mA cm鈥?, comparable to that recorded with I3鈥?/sup>/I鈥?/sup> (3.8 mA cm鈥?).