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학술지 Polypyrrole/Poly(Vinyl Alcohol-Co-Ethylene) Quasi-Solid Gel Electrolyte for Iodine-Free Dye-Sensitized Solar Cells
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저자
정미희
발행일
201412
출처
Journal of Power Sources, v.268, pp.557-564
ISSN
0378-7753
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.jpowsour.2014.06.095
협약과제
14ZC2100, 지능형 그린하우스 개발, 문애경
초록
Conducting polymer gel electrolyte is synthesized using the Cl- doped polypyrrole (PPy)/1-buty-2,3-dimethylimidazolium iodide (BDI)/poly(vinyl alcohol-co-ethylene)(PVA-EL), which yield an overall energy-conversion efficiency of about 4.72% comparable to the liquid electrolyte 4.69% under irradiation at 100 mW cm-2 AM 1.5. The introduction of PPy and PVA-EL into the BDI (which dissolves in the dimethylsulfoxide) increases the ion conductivity and effectively decreases the charge transfer resistance in the PPy gel electrolyte/TiO2/dye interfaces. With the change of the PVA-EL composition, PPy gel electrolyte exhibits independence of the content of PVA-EL, which means ion conductivity of PPy gel electrolyte as a dominant role for the contribution of cell performance. Employing intensity-modulated photo-voltage spectroscopy, intensity-modulated photo-current spectroscopy, and charge-extraction measurement, it demonstrate that the effective charge collection in PPy gel electrolyte devices rather than liquid electrolyte one is occurred due to the larger diffusion coefficient and long electron lifetime, resulting in the higher-efficiency solar cell. © 2014 Elsevier B.V. All rights reserved.
키워드
Block copolymer, Conducting polymer, Dye-sensitized solar cells, Gel electrolyte, Polypyrrole
KSP 제안 키워드
3-dimethylimidazolium, Cl-, Conducting polymers, Conversion efficiency(C.E.), Diffusion coefficient(D0), Dye-sensitized solar cells(DSCs), Effective charges, Electron lifetime, Intensity-modulated, Ion conductivity, Liquid electrolyte