Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 194, Issue 2-3, Pages 148-151Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2007.08.001
Keywords
dye-sensitized solar cell; ionic diffusion; poly(ethylene glycol); non-volatile electrolyte
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Funding
- Ministry of Education, Science & Technology (MoST), Republic of Korea [2E20000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A1908] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The diffusion coefficients of I- and I-3(-) 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 I-3(-) 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. (C) 2007 Elsevier B.V. All rights reserved.
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