Electrolytes for Dye-Sensitized Solar Cells Based on Interhalogen Ionic Salts and Liquids
- 7 April 2007
- journal article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 46 (9) , 3566-3575
- https://doi.org/10.1021/ic062244b
Abstract
In this paper, we report on the preparation of interhalogen ionic liquids of the general formula [K+]XY2-, where K+ = 1,3-dialkylimidazolium, 1,2,3-trialkylimidazolium, or N-alkylpyridinium; XY2- = IBr2- or I2Br-. These compounds were characterized in solution and the solid state by NMR, IR, Raman, and mass spectroscopy. The crystal structure of the compound [Me2BuIm]IBr2 (7) shows that the IBr2- anion has a linear Br−I−Br structure. Indications of an equilibrium between different forms of XY2- anions in solution are observed. Interhalogen ionic salts and liquids were used as electrolyte components for encapsulated monolithic dye-sensitized solar cells. Overall light-to-electricity conversion efficiencies up to 6.4%, 5.0%, and 2.4% at 1000 W/m2 were achieved by using electrolytes based on interhalogen ionic salts and γ-butyrolactone, glutaronitrile, or native ionic liquids as solvents, respectively. Moreover, in terms of stability, the cell performance lost 9−14% of the initial performance after 1000 h illumination at 350 W/m2.Keywords
This publication has 36 references indexed in Scilit:
- Ionic liquid crystal as a hole transport layer of dye-sensitized solar cellsChemical Communications, 2005
- An alternative ionic liquid based electrolyte for dye-sensitized solar cellsPhotochemical & Photobiological Sciences, 2004
- A Binary Ionic Liquid Electrolyte to Achieve ≥7% Power Conversion Efficiencies in Dye-Sensitized Solar CellsChemistry of Materials, 2004
- Multi-colored dye-sensitized solar cellsJournal of Photochemistry and Photobiology A: Chemistry, 2004
- A New Ionic Liquid Electrolyte Enhances the Conversion Efficiency of Dye-Sensitized Solar CellsThe Journal of Physical Chemistry B, 2003
- A stable quasi-solid-state dye-sensitized solar cell with an amphiphilic ruthenium sensitizer and polymer gel electrolyteNature Materials, 2003
- Photocurrent-Determining Processes in Quasi-Solid-State Dye-Sensitized Solar Cells Using Ionic Gel ElectrolytesThe Journal of Physical Chemistry B, 2003
- High efficiency dye-sensitized nanocrystalline solar cells based on ionic liquid polymer gel electrolyteChemical Communications, 2002
- Quasi-solid-state dye-sensitized solar cells using room temperature molten salts and a low molecular weight gelatorChemical Communications, 2002
- Photoelectrochemical cellsNature, 2001