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Stable, high-efficiency ionic-liquid-based mesoscopic dye-sensitized solar cells

Kuang, Daibin and Klein, Cedric and Zhang, Zhipan and Ito, Seigo and Moser, Jacques-E. and Zakeeruddin, Shaik M. and Graetzel, Michael (2007) Stable, high-efficiency ionic-liquid-based mesoscopic dye-sensitized solar cells. SMALL, 3 (12). pp. 2094-2102.

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Efficient and stable mesoscopic dye-sensitized solar cells (DSCs) introducing a low-viscosity binary ionic liquid (1-propyl-3-methyl-imidazolium iodide (PMII) and 1-ethyl-3-methyl-imidazolium tetracyanoborate (EMIB(CN)4)) electrolyte in combination with a new high-molar-extinction-coefficient ruthenium complex, Ru(2,2-bipyridine-4,4-dicarboxylic acid)(4,4-bis(2-(4-tert-butyloxy -phenyl)ethenyl) -2,2-bipyridine) (NCS)2, are demonstrated. The dependence of photovoltaic performance, charge transport and electron lifetime on the composition of the binary ionic-liquid electrolyte with different ratios of PMII/EMIB(CN)4 were investigated by electrochemical impedance and photovoltage transient techniques. A photovoltaic conversion efficiency of 7.6 % was obtained under simulated full sunlight illumination, which is a record for solvent-free DSCs. These devices exhibit excellent stability at 80 °C in the dark or under visible-light soaking at 60 °C during 1000 h of accelerated tests.

Item Type:Article
Uncontrolled Keywords:dyes; ionic liquids; nanocrystals; solar cells
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanostructured materials
ID Code:5891
Deposited By:IoN
Deposited On:11 Sep 2009 09:50
Last Modified:11 Sep 2009 09:50

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