Self-organization of porphyrins and fullerenes for molecular photoelectrochemical devices.
We have constructed a variety of molecular assemblies of porphyrin as a donor and fullerene as an acceptor on electrodes for molecular photoelectrochemical devices. Highly efficient energy- and electron-transfer processes have been realized at gold electrodes modified with self-assembled monolayers of porphyrin- or fullerene linked systems mimicking light-harvesting and charge separation in bacterial photosynthesis. Highly ordered organization of porphyrins and fullerenes has also been achieved using step-by-step self-assembly of porphyrin and fullerene units by association with gold nanoparticles or dendrimers on tin oxide electrodes, which exhibit high power-conversion efficiency of up to 1.5%. These results will provide valuable information on the design of donor-acceptor type molecular assemblies that can be tailored to construct highly efficient organic solar cells.
Umeyama
Tomokazu
T
Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, 615-8510 Nishikyo-ku, Kyoto, Japan.
Imahori
Hiroshi
H
D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry; D010777:Photochemistry; D011166:Porphyrins / Q000737:chemistry*
D037741:Fullerenes; D011166:Porphyrins; D006046:Gold