Issue 32, 2012

Iodide-functionalized graphene electrolyte for highly efficient dye-sensitized solar cells

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.

Graphical abstract: Iodide-functionalized graphene electrolyte for highly efficient dye-sensitized solar cells

Article information

Article type
Paper
Submitted
13 May 2012
Accepted
20 Jun 2012
First published
22 Jun 2012

J. Mater. Chem., 2012,22, 16477-16483

Iodide-functionalized graphene electrolyte for highly efficient dye-sensitized solar cells

M. Jung, M. G. Kang and M. Chu, J. Mater. Chem., 2012, 22, 16477 DOI: 10.1039/C2JM33028H

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