Influence of salts on ionic diffusion in oligomer electrolytes and its implication in dye-sensitized solar cells

Jong Hyuk Park, Jun Ho Yum, Sun Young Kim, Moon Sung Kang, Yong Gun Lee, Sang-Soo Lee, Yong Soo Kang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The diffusion coefficients of I- and I3 - in poly(ethylene glycol) (PEG) oligomer electrolytes as a function of salt type and salt concentration were measured. It was found that the diffusion coefficient of I3 - in PEG oligomer electrolytes with potassium iodide (KI) was much lower than that with imidazolium iodide (MPII) because of the difference in the interactions of polar oxygen atoms in the PEG oligomer with K+ or MPI+. In addition, it was also confirmed that this phenomenon affected the recombination process, electron lifetime and consequently, the performance of the DSSCs.

Original languageEnglish
Pages (from-to)148-151
Number of pages4
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume194
Issue number2-3
DOIs
Publication statusPublished - 2008 Feb 20

Keywords

  • Dye-sensitized solar cell
  • Ionic diffusion
  • Non-volatile electrolyte
  • Poly(ethylene glycol)

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

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