title: Enhancement of light-energy conversion efficiency by multi-porphyrin arrays of porphyrin-peptide oligomers with fullerene clusters.
abstract: Organic photovoltaic cells using supramolecular complexes of porphyrin-peptide oligomers (porphyrin-functionalized alpha-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 alpha-polypeptide structures. A high power conversion efficiency (eta) 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.
authors.forename: Taku
authors.initials: T
authors.lastname: Hasobe
authors.forename: Prashant V
authors.initials: PV
authors.lastname: Kamat
authors.forename: Vincent
authors.initials: V
authors.lastname: Troiani
authors.forename: Nathalie
authors.initials: N
authors.lastname: Solladié
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Ahn
authors.forename: Seong Keun
authors.initials: SK
authors.lastname: Kim
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Anusorn
authors.initials: A
authors.lastname: Kongkanand
authors.forename: Susumu
authors.initials: S
authors.lastname: Kuwabata
authors.forename: Shunichi
authors.initials: S
authors.lastname: Fukuzumi
mesh_terms: D004563:Electrochemistry; D037741:Fullerenes / Q000737:chemistry / Q000528:radiation effects; D008027:Light; D015394:Molecular Structure; D010316:Particle Size; D010455:Peptides / Q000737:chemistry / Q000528:radiation effects; D010777:Photochemistry; D011166:Porphyrins / Q000737:chemistry / Q000528:radiation effects
chemical_list: D037741:Fullerenes; D010455:Peptides; D011166:Porphyrins