Abstract
We report a series of novel imidazolium iodides based ionic liquids (NMIPHI, NAIPHI, and NBIPHI) with different functional groups for the development of a quasi-solid type electrolyte for dye-sensitized solar cells (DSSCs). The diffusion coefficients of redox ions (I- and I3 -) are dependent on the molecular weight and it was higher for lighter salts. Among the three ionic liquids, NMIPHI showed highest efficiency of 4.18% when it was used in a liquid electrolyte of a DSSC with ca. 6 μm thick TiO2 mesoporous film. Even though the efficiency was ca. 19% lower than that obtained from a liquid electrolyte composed of PMII. When NMIPHI was mixed with PMII with a molar ratio of 1:1 in a solvent free electrolyte, the efficiency of the DSSCs was enhanced compared to that based on pristine PMII.
Original language | English |
---|---|
Pages (from-to) | 1480-1484 |
Number of pages | 5 |
Journal | Bulletin of the Korean Chemical Society |
Volume | 33 |
Issue number | 5 |
DOIs | |
State | Published - 20 May 2012 |
Keywords
- Binary ionic liquid
- Dye-sensitized solar cells
- Electrolyte
- Gel electrolyte
- Imidazolium iodide