A Series of N-Alkylimidazolium Propylhexanamide Iodide for Dye-Sensitized Solar Cells
作者:Sung-Su Lim、Subrata Sarker、Sun-Young Yoon、Narayan Chandra Deb Nath、Young-Jun Kim、Heung-Bae Jeon、Jae-Joon Lee
DOI:10.5012/bkcs.2012.33.5.1480
日期:2012.5.20
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 $I_3^-}$) 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 $\mu}m$ thick $TiO_2$ 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.
我们报告了一系列新型咪唑盐碘化物(NMIPHI、NAIPHI和NBIPHI),这些离子液体具有不同的官能团,用于开发染料敏化太阳能电池(DSSCs)的准固态电解质。红氧化还原离子的扩散系数($I^-$ 和 $I_3^-}$)依赖于分子量,较轻的盐具有更高的扩散系数。在这三种离子液体中,NMIPHI在厚度约为6 $\mu}m$的$TiO_2$多孔膜中的液态电解质利用时,效率最高,达到了4.18%。尽管该效率比由PMII组成的液态电解质获得的效率低约19%。当NMIPHI与PMII以1:1的摩尔比混合在无溶剂电解质中时,与基于原始PMII的电池相比,DSSC的效率得到了提升。