Jump to main content
Jump to site search

Issue 6, 2012
Previous Article Next Article

Ru(II) sensitizers with a tridentate heterocyclic cyclometalate for dye-sensitized solar cells

Author affiliations

Abstract

A new series of bis-tridentate, thiocyanate-free Ru(II) complexes (TF-21–TF-24), containing the 2-azolyl-6-phenylpyridine cyclometalate, were synthesized. Upon switching from a pyrazolyl to a more electron deficient triazolyl moiety, the oxidation potentials were fine-tuned to readily accept electrons from the I/I3 redox couple, so that the dye regeneration proceeds efficiently amid the device operation. This, together with high concentrations of 1,3-dimethylimidazolium iodide in the electrolyte which accelerates dye regeneration, attains a short-circuit photocurrent density as high as 18.09 mA cm−2 and an overall efficiency of 9.04%. The trifling decrease (3–6%) in efficiency after 1000 h of illumination at 60 °C manifests the high device stability, due to the much suppressed solvent volatility in combination with the robust bis-tridentate structure involved in cyclometalating the 2-azolyl-6-phenylpyridine ancillary.

Graphical abstract: Ru(ii) sensitizers with a tridentate heterocyclic cyclometalate for dye-sensitized solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Jan 2012, accepted on 13 Apr 2012 and first published on 13 Apr 2012


Article type: Communication
DOI: 10.1039/C2EE21091F
Citation: Energy Environ. Sci., 2012,5, 7549-7554
  •   Request permissions

    Ru(II) sensitizers with a tridentate heterocyclic cyclometalate for dye-sensitized solar cells

    C. Hsu, S. Ho, K. Wu, Y. Chi, S. Liu and P. Chou, Energy Environ. Sci., 2012, 5, 7549
    DOI: 10.1039/C2EE21091F

Search articles by author

Spotlight

Advertisements