Enhancement of light-energy conversion efficiency by multi-porphyrin arrays of porphyrin-peptide oligomers with fullerene clusters

Taku Hasobe, Prashant V. Kamat, Vincent Troiani, Nathalie Solladié, Tae Kyu Ahn, Seong Keun Kim, Dongho Kim, Anusorn Kongkanand, Susumu Kuwabata, Shunichi Fukuzumi

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Abstract

Organic photovoltaic cells using supramolecular complexes of porphyrin-peptide oligomers (porphyrin-functionalized α-polypeptides) with fullerene demonstrate remarkable enhancement in the photoelectrochemical performance as well as broader photoresponse in the visible and near-infrared regions by increasing the number of porphyrin units in α-polypeptide structures. A high power conversion efficiency (η) of 1.3% and a maximum incident photon-to-photocurrent efficiency (IPCE) of 42% were attained using composite clusters of porphyrin-peptide octamer and fullerene. These results clearly show that the formation of a molecular assembly between fullerene and multi-porphyrin arrays with a polypeptide backbone controls the electron transfer efficiency in the supramolecular complex, which is essential for the light-energy conversion.

Original languageEnglish
Pages (from-to)19-23
Number of pages5
JournalJournal of Physical Chemistry B
Volume109
Issue number1
DOIs
Publication statusPublished - 2005 Jan 13

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Hasobe, T., Kamat, P. V., Troiani, V., Solladié, N., Ahn, T. K., Kim, S. K., Kim, D., Kongkanand, A., Kuwabata, S., & Fukuzumi, S. (2005). Enhancement of light-energy conversion efficiency by multi-porphyrin arrays of porphyrin-peptide oligomers with fullerene clusters. Journal of Physical Chemistry B, 109(1), 19-23. https://doi.org/10.1021/jp045246v