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Journal of Nanomaterials
Volume 2009, Article ID 698501, 4 pages
http://dx.doi.org/10.1155/2009/698501
Research Article

Applications of Cu@C Nanoparticles in New Dye-Sensitized Solar Cells

1Department of Environmental Engineering, National Cheng Kung University, Tainan City 70101, Taiwan
2Sustainable Environment Research Center, National Cheng Kung University, Tainan City 70101, Taiwan
3Department of Chemistry, National Cheng Kung University, Tainan City 70101, Taiwan

Received 6 October 2008; Accepted 22 January 2009

Academic Editor: Alan K. T. Lau

Copyright © 2009 Chang-Yu Liao 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 efficiency of a newly developing dye-sensitized solar cell (DSSC), the Cu@C (Cu and 20 nm) core-shell nanoparticles-dispersed molten salt-conjugated electrolyte has been studied. Experimentally, the efficiencies ( ) of the DSSC are in the range of 2.70–4.09% with a short-circuit photocurrent density ( ) of 5.775–9.910 mA/ . Interestingly, it is found that dispersion of 1% of the Cu@C (Cu  nm) nanoparticles in the molten salt-(1,2-dimethyl-3-propylimidazolium iodide (DMPII)) conjugated electrolyte results in an enhancement (about 11%) of the (4.06%). Greater fractions (3–10%) of the Cu@C nanoparticles dispersed in the molten salt cause a poor performance (lower and ) of the DSSC possibly due to interference of the internal electron transportation routes in the DSSC by oxidation of Cu with originally in the electrolyte.