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Understanding and improving solid-state polymer/C60-fullerene bulk-heterojunction solar cells using ternary porphyrin blends

Journal Article


Abstract


  • Solid-state heterojunction solar cells formed from binary blends of conjugated polymers and fullerenes provide a promising class of org. devices. We demonstrate that ternary blends incorporating porphyrins can be of similar morphol. to the binary mixt. and retain full device functionality. They allow, for the first time, the construction of efficient devices contg. less than 10% polymer. By analyzing the absorption spectra as a function of concn., we det. the proportion of light absorbed by each individual component in both binary and ternary mixts. This anal. reveals that the majority of the light is absorbed by the fullerene in 1:4 polymer/C60-fullerene blends, with over 50% of the photocurrent produced under AM 1.5 conditions occurring subsequent to C60-fullerene absorption. This result provides for a consistent understanding of the origin of primary charge sepn. in general polymer/C60-fullerene blends, polymer/C70-fullerene blends, and polymer-fullerene dyad mols. Porphyrins are demonstrated to add broad-band character to the device and may be used to tune for particular wavelengths; they also are shown to initiate primary charge sepn. through electron-transfer to the fullerene. Finally, addn. of the porphyrin is shown to increase the internal quantum efficiency following polymer absorption from ca. 60 to 80%. [on SciFinder (R)]

Authors


  •   Dastoor, Paul C. (external author)
  •   McNeill, C (external author)
  •   Frohne, H (external author)
  •   Foster, Christopher J (external author)
  •   Dean, Brian (external author)
  •   Fell, Christopher J (external author)
  •   Belcher, Warwick J. (external author)
  •   Campbell, Wayne M. (external author)
  •   Officer, David L.
  •   Blake, Iain M (external author)
  •   Thordarson, Pall (external author)
  •   Crossley, Maxwell J. (external author)
  •   Hush, Noel S (external author)
  •   Reimers, Jeffrey R. (external author)

Publication Date


  • 2007

Citation


  • Dastoor, P., McNeill, C., Frohne, H., Foster, C. J., Dean, B., Fell, C. J., Belcher, W., Campbell, W. M., Officer, D. L., Blake, I. M., Thordarson, P., Crossley, M. J., Hush, N. S. & Reimers, J. R. (2007). Understanding and improving solid-state polymer/C60-fullerene bulk-heterojunction solar cells using ternary porphyrin blends. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 111 (42), 15415-15426.

Scopus Eid


  • 2-s2.0-35748941697

Number Of Pages


  • 11

Start Page


  • 15415

End Page


  • 15426

Volume


  • 111

Issue


  • 42

Abstract


  • Solid-state heterojunction solar cells formed from binary blends of conjugated polymers and fullerenes provide a promising class of org. devices. We demonstrate that ternary blends incorporating porphyrins can be of similar morphol. to the binary mixt. and retain full device functionality. They allow, for the first time, the construction of efficient devices contg. less than 10% polymer. By analyzing the absorption spectra as a function of concn., we det. the proportion of light absorbed by each individual component in both binary and ternary mixts. This anal. reveals that the majority of the light is absorbed by the fullerene in 1:4 polymer/C60-fullerene blends, with over 50% of the photocurrent produced under AM 1.5 conditions occurring subsequent to C60-fullerene absorption. This result provides for a consistent understanding of the origin of primary charge sepn. in general polymer/C60-fullerene blends, polymer/C70-fullerene blends, and polymer-fullerene dyad mols. Porphyrins are demonstrated to add broad-band character to the device and may be used to tune for particular wavelengths; they also are shown to initiate primary charge sepn. through electron-transfer to the fullerene. Finally, addn. of the porphyrin is shown to increase the internal quantum efficiency following polymer absorption from ca. 60 to 80%. [on SciFinder (R)]

Authors


  •   Dastoor, Paul C. (external author)
  •   McNeill, C (external author)
  •   Frohne, H (external author)
  •   Foster, Christopher J (external author)
  •   Dean, Brian (external author)
  •   Fell, Christopher J (external author)
  •   Belcher, Warwick J. (external author)
  •   Campbell, Wayne M. (external author)
  •   Officer, David L.
  •   Blake, Iain M (external author)
  •   Thordarson, Pall (external author)
  •   Crossley, Maxwell J. (external author)
  •   Hush, Noel S (external author)
  •   Reimers, Jeffrey R. (external author)

Publication Date


  • 2007

Citation


  • Dastoor, P., McNeill, C., Frohne, H., Foster, C. J., Dean, B., Fell, C. J., Belcher, W., Campbell, W. M., Officer, D. L., Blake, I. M., Thordarson, P., Crossley, M. J., Hush, N. S. & Reimers, J. R. (2007). Understanding and improving solid-state polymer/C60-fullerene bulk-heterojunction solar cells using ternary porphyrin blends. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 111 (42), 15415-15426.

Scopus Eid


  • 2-s2.0-35748941697

Number Of Pages


  • 11

Start Page


  • 15415

End Page


  • 15426

Volume


  • 111

Issue


  • 42