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Full Paper
Stable, High-Efficiency Ionic-Liquid-Based Mesoscopic Dye-Sensitized Solar Cells
Article first published online: 20 NOV 2007
DOI: 10.1002/smll.200700211
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Kuang, D., Klein, C., Zhang, Z., Ito, S., Moser, J.-E., Zakeeruddin, Shaik. M. and Grätzel, M. (2007), Stable, High-Efficiency Ionic-Liquid-Based Mesoscopic Dye-Sensitized Solar Cells. Small, 3: 2094–2102. doi: 10.1002/smll.200700211
Publication History
- Issue published online: 4 DEC 2007
- Article first published online: 20 NOV 2007
- Manuscript Revised: 5 SEP 2007
- Manuscript Received: 22 MAR 2007
- Abstract
- Article
- References
- Cited By
Keywords:
- dyes;
- ionic liquids;
- nanocrystals;
- solar cells
Abstract
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.