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Iodide-functionalized graphene electrolyte for highly efficient dye-sensitized solar cells
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- Authors
- Mi-Hee Jung, Man Gu Kang, Moo-Jung Chu
- Issue Date
- 2012-08
- Citation
- Journal of Materials Chemistry, v.22, no.32, pp.16477-16483
- ISSN
- 0959-9428
- Publisher
- Royal Society of Chemistry (RSC)
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- 3-dimethylimidazolium, Electrocatalytic activity, Graphene oxide, High performance, Highly efficient, Intermolecular charge transfer, Positively charged, Triiodide reduction, X-ray photoelectron spectroscopic, dye sensitized solar cells(DSSC), electron acceptor