Enhancement of light-energy conversion efficiency by multi-porphyrin arrays of porphyrin-peptide oligomers with fullerene clusters.
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.
Hasobe
Taku
T
Kamat
Prashant V
PV
Troiani
Vincent
V
Solladié
Nathalie
N
Ahn
Tae Kyu
TK
Kim
Seong Keun
SK
Kim
Dongho
D
Kongkanand
Anusorn
A
Kuwabata
Susumu
S
Fukuzumi
Shunichi
S
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
D037741:Fullerenes; D010455:Peptides; D011166:Porphyrins