Cited by 77Organic Electronics and PhotovoltaicsFullerene Chemistry and ApplicationsOrganic Light-Emitting Diodes Research

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Understanding and Improving Solid-State Polymer/C60-Fullerene Bulk-Heterojunction Solar Cells Using Ternary Porphyrin Blends

Abstract

Solid-state heterojunction solar cells formed from binary blends of conjugated polymers and fullerenes provide a promising class of organic devices. We demonstrate that ternary blends incorporating porphyrins can be of similar morphology to the binary mixture and retain full device functionality. They allow, for the first time, the construction of efficient devices containing less than 10% polymer. By analyzing the absorption spectra as a function of concentration, we determine the proportion of light absorbed by each individual component in both binary and ternary mixtures. This analysis reveals that the majority of the light is absorbed by the fullerene in 1:4 polymer/C 60 -fullerene blends, with over 50% of the photocurrent produced under AM 1.5 conditions occurring subsequent to C 60 -fullerene absorption. This result provides for a consistent understanding of the origin of primary charge separation in general polymer/C 60 -fullerene blends, polymer/C 70 -fullerene blends, and polymer-fullerene dyad molecules. 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 separation through electron-transfer to the fullerene. Finally, addition of the porphyrin is shown to increase the internal quantum efficiency following polymer absorption from ca. 60 to 80%.

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Crossref · 10.1021/jp0748664

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  • Porphyrin broadened the absorption range, contributed to the photocurrent generation and initiated primary charge separation.

    “The results indicate that porphyrin broadened the absorption range, contributed to the photocurrent generation and initiated primary charge separation.”

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Metadata

Authors
Dastoor, P. C., McNeill, C. R., Frohne, H., Foster, C. J., Dean, B., Fell, C. J., Belcher, W. J., Campbell, W. M., Officer, D. L., Blake, I. M., Thordarson, P., Crossley, M. J., Hush, N. S., & Reimers, J. R.
Affiliations
The University of Sydney (AU)
Corresponding author
Reimers, Jeffrey R.
Venue
The Journal of Physical Chemistry C
Published
2007-10-01
Volume
111
Issue
42
Pages
15415-15426
ISSN
  • 1932-7447 (ISSN-L)
  • 1932-7455
OpenAlex
W2017069649
Cited by
77
References
0
Citations by year
2026: 1 · 2025: 5 · 2023: 1 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 4 · 2015: 5 · 2014: 8 · 2013: 7 · 2012: 9
FWCI
4.73
Type
journal article
Language
en
Open access
closed
Locations
The Journal of Physical Chemistry C (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
  • Physical Sciences › Chemistry › Organic Chemistry › Fullerene Chemistry and Applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
Keywords
bulk heterojunction, ternary mixtures, porphyrins, conjugated polymers, primary charge separation, electron transfer, internal quantum efficiency, absorption spectra

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