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High molar extinction coefficient ruthenium sensitizers for thin film dye-sensitized solar cells

Journal Article


Abstract


  • We present two sensitizers, Ru(4,4′-dicarboxyvinyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K9)

    and Ru(4,4′-dicarboxy(phenylethenyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K23), which were

    synthesized and characterized by analytical, spectroscopic, and electrochemical impedance measurements.

    The two sensitizers that contain hydrophobic alkyl chains and an extended π-conjugation bridge between

    carboxylic acid groups and the ruthenium chromophore center exhibit enhanced red response and higher

    molar extinction coefficients when compared to the Ru(4,4′-dicarboxy-2,2′-bipyridine)(4,4′-dinonyl-2,2′-

    bipyridine)(NCS)2 (Z907) sensitizer. The performances of the K9, K23, and Z907 sensitizers in nanocrystalline

    TiO2-based thin film solar cells were studied using transparent 2.6-μm-thick mesoporous layers, which show

    short-circuit photocurrent densities (Jsc) of 7.80, 8.31, and 7.16 mA/cm2, corresponding to overall conversion

    efficiencies of 4.14, 4.41, and 4.06%, respectively. The increase in the Jsc of the cells with K9 and K23 with

    respect to that with Z907 is due to the enhanced molar extinction coefficient of the new sensitizers. The

    incident monochromatic photon-to-current conversion efficiency for the K23 is plotted as a function of excitation

    wavelength show in the plateau region 79% and even at 700 nm 69%.

Authors


  •   Jang, Song-Rim (external author)
  •   Yum, Jun-Ho (external author)
  •   Klein, Cedric (external author)
  •   Kim, Kang-Jin (external author)
  •   Wagner, Pawel
  •   Officer, David L.
  •   Gratzel, Michael (external author)
  •   Nzeeruddin, Mohammad K. (external author)

Publication Date


  • 2009

Citation


  • Jang, S., Yum, J., Klein, C., Kim, K., Wagner, P. W., Officer, D. L., Gratzel, M. & Nzeeruddin, M. K. (2009). High molar extinction coefficient ruthenium sensitizers for thin film dye-sensitized solar cells. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 113 (5), 1998-2003.

Scopus Eid


  • 2-s2.0-61649111371

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/372

Number Of Pages


  • 5

Start Page


  • 1998

End Page


  • 2003

Volume


  • 113

Issue


  • 5

Place Of Publication


  • http://pubs.acs.org/journals/jpccck/

Abstract


  • We present two sensitizers, Ru(4,4′-dicarboxyvinyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K9)

    and Ru(4,4′-dicarboxy(phenylethenyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K23), which were

    synthesized and characterized by analytical, spectroscopic, and electrochemical impedance measurements.

    The two sensitizers that contain hydrophobic alkyl chains and an extended π-conjugation bridge between

    carboxylic acid groups and the ruthenium chromophore center exhibit enhanced red response and higher

    molar extinction coefficients when compared to the Ru(4,4′-dicarboxy-2,2′-bipyridine)(4,4′-dinonyl-2,2′-

    bipyridine)(NCS)2 (Z907) sensitizer. The performances of the K9, K23, and Z907 sensitizers in nanocrystalline

    TiO2-based thin film solar cells were studied using transparent 2.6-μm-thick mesoporous layers, which show

    short-circuit photocurrent densities (Jsc) of 7.80, 8.31, and 7.16 mA/cm2, corresponding to overall conversion

    efficiencies of 4.14, 4.41, and 4.06%, respectively. The increase in the Jsc of the cells with K9 and K23 with

    respect to that with Z907 is due to the enhanced molar extinction coefficient of the new sensitizers. The

    incident monochromatic photon-to-current conversion efficiency for the K23 is plotted as a function of excitation

    wavelength show in the plateau region 79% and even at 700 nm 69%.

Authors


  •   Jang, Song-Rim (external author)
  •   Yum, Jun-Ho (external author)
  •   Klein, Cedric (external author)
  •   Kim, Kang-Jin (external author)
  •   Wagner, Pawel
  •   Officer, David L.
  •   Gratzel, Michael (external author)
  •   Nzeeruddin, Mohammad K. (external author)

Publication Date


  • 2009

Citation


  • Jang, S., Yum, J., Klein, C., Kim, K., Wagner, P. W., Officer, D. L., Gratzel, M. & Nzeeruddin, M. K. (2009). High molar extinction coefficient ruthenium sensitizers for thin film dye-sensitized solar cells. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 113 (5), 1998-2003.

Scopus Eid


  • 2-s2.0-61649111371

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/372

Number Of Pages


  • 5

Start Page


  • 1998

End Page


  • 2003

Volume


  • 113

Issue


  • 5

Place Of Publication


  • http://pubs.acs.org/journals/jpccck/