A series of N-Alkylimidazolium propylhexanamide iodide for dye-sensitized solar cells

Sung Su Lim, Subrata Sarker, Sunyoung Yoon, Narayan Chandra Deb Nath, Young Jun Kim, Heung Bae Jeon, Jae Joon Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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 languageEnglish
Pages (from-to)1480-1484
Number of pages5
JournalBulletin of the Korean Chemical Society
Volume33
Issue number5
DOIs
StatePublished - 20 May 2012

Keywords

  • Binary ionic liquid
  • Dye-sensitized solar cells
  • Electrolyte
  • Gel electrolyte
  • Imidazolium iodide

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