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

Authors
Park, Jong HyukYum, Jun-HoKim, Sun-YoungKang, Moon-SungLee, Yong-GunLee, Sang-SooKang, Yong Soo
Issue Date
2008-02-20
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v.194, no.2-3, pp.148 - 151
Abstract
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.
Keywords
CHARGE-TRANSPORT; REDOX COUPLE; POLYMER ELECTROLYTES; SILICA NANOPARTICLES; LIQUID ELECTROLYTE; RECOMBINATION; EFFICIENCY; SYSTEMS; IODIDE; CHARGE-TRANSPORT; REDOX COUPLE; POLYMER ELECTROLYTES; SILICA NANOPARTICLES; LIQUID ELECTROLYTE; RECOMBINATION; EFFICIENCY; SYSTEMS; IODIDE; dye-sensitized solar cell; ionic diffusion; poly(ethylene glycol); non-volatile electrolyte
ISSN
1010-6030
URI
https://pubs.kist.re.kr/handle/201004/133728
DOI
10.1016/j.jphotochem.2007.08.001
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KIST Article > 2008
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