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학술지 Iodide-functionalized graphene electrolyte for highly efficient dye-sensitized solar cells
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저자
정미희, 강만구, 주무정
발행일
201208
출처
Journal of Materials Chemistry, v.22 no.32, pp.16477-16483
ISSN
0959-9428
출판사
Royal Society of Chemistry (RSC)
DOI
https://dx.doi.org/10.1039/c2jm33028h
협약과제
12ZK1100, 그린IT 융.복합 기술개발, 이수인
초록
1-Octyl-2,3-dimethylimidazolium iodide, ODI, was used as an electron acceptor to functionalize graphene to impart electrocatalytic activity for triiodide reduction in dye-sensitized solar cells (DSSCs). Raman and X-ray photoelectron spectroscopic measurements identified the graphene formation from graphene oxide with ODI. The resultant graphene positively charged via an intermolecular charge-transfer process with ODI showed remarkable electrocatalytic activity toward triiodide reduction. The inner work mechanism of solar cell devices was analyzed by intensity-modulated photovoltage spectroscopy, by intensity modulated photocurrent spectroscopy, and through an analysis of photovoltage transients. The results indicated that ODI-graphene electrolyte provides effective intermolecular charge transfer, thus making it feasible for use in the creation of high-performance DSSC devices. © The Royal Society of Chemistry 2012.
KSP 제안 키워드
3-dimethylimidazolium, Dye-sensitized solar cells(DSCs), Electron acceptor, Functionalized graphene(f-GNS), Graphene oxide(GOS), High performance, Intensity modulated photocurrent spectroscopy, Intermolecular charge transfer, Positively charged, Triiodide reduction, X-ray photoelectron spectroscopic