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Journal of Nanomaterials
Volume 2009 (2009), Article ID 472950, 4 pages
http://dx.doi.org/10.1155/2009/472950
Research Article

Nanosize Copper Dispersed Ionic Liquids As an Electrolyte of New Dye-Sensitized Solar Cells

1Department of Chemistry, National Cheng Kung University, Tainan City 701, Taiwan
2Sustainable Environment Research Center, National Cheng Kung University, Tainan City 701, Taiwan
3Department of Environmental Engineering, National Cheng Kung University, Tainan City 701, Taiwan

Received 6 October 2008; Accepted 22 January 2009

Academic Editor: Alan K. T. Lau

Copyright © 2009 Fu-Lin Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To enhance the electrical conductivity of the electrolyte for a newly developed dye-sensitized solar cell (DSSC), metallic copper (Cu) encapsulated within the carbon shell (Cu@C) nanoparticles dispersed in a room temperature ionic liquid (RTIL) (e.g., [ ][ ]) has been studied in the present work. By the pulsed-field gradient spin-echo NMR method, the self-diffusion coefficients of cations and anions of the RTIL have been determined. The self-diffusion coefficient of the [ ] cations in the RTIL dispersed with 0.08% of Cu@C nanoparticles is increased by 35%. The electrical conductivity of the Cu@C dispersed RTIL is also increased by 65% (1.0 2.3 ms/cm). It is very clear the nanosize Cu@C dispersed RTIL with a relatively greater diffusion coefficient and electrical conductivity can be a very effective electrolyte especially utilized in DSSCs.