Supramolecular Photovoltaic Cells Using Porphyrin Dendrimers and Fullerene

Hasobe, Taku; Kashiwagi, Yukiyasu; Absalom, Mark A.; Sly, Joseph; Hosomizu, Kohei; Crossley, Maxwell J.; Imahori, Hiroshi; Kamat, Prashant V.; Fukuzumi, Shunichi

doi:10.1002/adma.200306519

Cited by 161 publications

(108 citation statements)

References 39 publications

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“…In a related study by Fukuzumi, Crossley, and co-workers, supramolecular complexes of porphyrin dendrimers with fullerenes were applied as organic photovoltaic systems. [49] Upon mixing dendrimers containing 4, 8, or 16 porphyrins with C 60 in acetonitrile/toluene (3:1), complexation of the fullerenes was observed, and, at the same time, large well-defined nanoclusters several hundreds of nanometers in size were formed. These clusters were deposited onto a SnO 2 electrode, which upon this modification was shown to display a much enhanced absorptivity compared to an electrode with clusters containing a monomeric reference porphyrin.…”

Section: Perylene Arraysmentioning

confidence: 98%

Molecular Materials by Self‐Assembly of Porphyrins, Phthalocyanines, and Perylenes

et al. 2006

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Porphyrins, phthalocyanines, and perylenes are compounds with great potential for serving as components of molecular materials that possess unique electronic, magnetic and photophysical properties. In general, a highly specific communication between a large number of these chromophores is required in order to express their function to a maximal level, and for this reason it is of importance to construct arrays in which the molecules are organized in well‐defined geometries with respect to their neighbors. This review is an account of some recent efforts to construct highly ordered assemblies of porphyrins, phthalocyanines, and perylenes by means of self‐assembly in solution and on surfaces, and by attaching them to polymeric scaffolds.

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Section: Perylene Arraysmentioning

confidence: 98%

Molecular Materials by Self‐Assembly of Porphyrins, Phthalocyanines, and Perylenes

et al. 2006

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“…We have extended the concept of dye-sensitized bulk heterojunction solar cells into more sophisticated supramolec- ular systems prepared using bottom-up self-organization of porphyrin and fullerene with dendrimers 109,110 and nanoparticles 108,111-116 on a SnO 2 electrode. In particular, porphyrinalkanethiol 17 (n: number of the methylene groups in the alkanethiol; n ¼ 5, 11, and 15) 156 are three-dimensionally organized onto a gold nanoparticle with a diameter of %2 nm to give multiporphyrin-modified gold nanoparticles 18 (n ¼ 5, 11, and 15) [199][200][201][202] with well-defined size (%10 nm) and spherical shape (step 1 in Scheme 6).…”

Section: ·-mentioning

confidence: 99%

Creation of Fullerene-Based Artificial Photosynthetic Systems

Imahori¹

2007

Bulletin of the Chemical Society of Japan

156

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Various porphyrin-fullerene-linked systems have been prepared to elucidate the intrinsic electron-transfer properties of fullerenes. Photodynamical studies on porphyrin-fullerene-linked systems showed that spherical fullerenes accelerated photoinduced electron transfer and charge-shift, but slowed down charge recombination, which is in sharp contrast with those of conventional planar acceptors such as quinones and imides. For the first time, it was shown that the unique electron-transfer properties result from the small reorganization energies of fullerenes arising from the delocalized system on the sphere together with the rigid structure. The small reorganization energies make it possible to produce a long-lived charge-separated state with a high quantum yield in donor-fullerene systems. The finding also will allow us to construct light energy conversion systems as well as artificial photosynthetic models. Highly efficient photoinduced energy and electron transfer were achieved on gold and ITO electrodes modified with self-assembled monolayers of the porphyrin-fullerene-linked systems. We also developed dye-sensitized bulk heterojunction solar cell possessing both characteristics of dye-sensitized and bulk heterojunction solar cells. These results showed the advantages of fullerenes as electron acceptors in artificial photosynthetic model, photonic molecular devices and machines, and organic molecular electronics including solar cells.

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“…Fukuzumi et al constructed an organic photovoltaic system using supramolecular complexes of porphyrin dendrimers with fullerenes [83,84]. By changing the dendrimer's structure and generation, optimization of efficiency in light energy conversion might become possible.…”

Section: Assembly With Materialsmentioning

confidence: 99%

Paradigm shift from self-assembly to commanded assembly of functional materials: recent examples in porphyrin/fullerene supramolecular systems

Ishihara

et al. 2012

Science and Technology of Advanced Materials

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Current nanotechnology based on top-down nanofabrication may encounter a variety of drawbacks in the near future so that development of alternative methods, including the so-called bottom-up approach, has attracted considerable attention. However, the bottom-up strategy, which often relies on spontaneous self-assembly, might be inefficient in the development of the requisite functional materials and systems. Therefore, assembly processes controlled by external stimuli might be a plausible strategy for the development of bottom-up nanotechnology. In this review, we demonstrate a paradigm shift from self-assembly to commanded assembly by describing several examples of assemblies of typical functional molecules, i.e. porphyrins and fullerenes. In the first section, we describe recent progress in the design and study of self-assembled and co-assembled supramolecular architectures of porphyrins and fullerenes. Then, we show examples of assembly induced by external stimuli. We emphasize the paradigm shift from self-assembly to commanded assembly by describing the recently developed electrochemical-coupling layer-by-layer (ECC-LbL) methodology.

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Supramolecular Photovoltaic Cells Using Porphyrin Dendrimers and Fullerene

Cited by 161 publications

References 39 publications

Molecular Materials by Self‐Assembly of Porphyrins, Phthalocyanines, and Perylenes

Molecular Materials by Self‐Assembly of Porphyrins, Phthalocyanines, and Perylenes

Creation of Fullerene-Based Artificial Photosynthetic Systems

Paradigm shift from self-assembly to commanded assembly of functional materials: recent examples in porphyrin/fullerene supramolecular systems

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