Multiple photosynthetic reaction centres composed of supramolecular assemblies of zinc porphyrin dendrimers with a fullerene acceptor

Fukuzumi, Shunichi; Saito, Kenji; Ohkubo, Kei; Khoury, Tony; Kashiwagi, Yukiyasu; Absalom, Mark A.; Gadde, Suresh; D’Souza, Francis; Araki, Yasuyuki; Ito, Osamu; Crossley, Maxwell J.

doi:10.1039/c1cc11725d

Cited by 73 publications

(44 citation statements)

References 24 publications

(19 reference statements)

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“…However, as shown in Figure S5b, no obvious difference of the final absorbance spectra between TCPP/C60PPy and C60PPy/TCPP was detected. The results probably indicate that not only is there a supramolecular π-π interaction between the adsorbed C60PPy and ZnTCPP in ZnTCPP/C60PPy sample, the coordination between C60PPy and ZnTCPP via the pyridine and Zn metal atom could be another supramolecular interaction in ZnTCPP/C60PPy as well3637. The result is well in agreement with that from photovoltaic tests.…”

Section: Resultssupporting

confidence: 85%

Enhancement of p-Type Dye-Sensitized Solar Cell Performance by Supramolecular Assembly of Electron Donor and Acceptor

Tian

Oscarsson

Gabrielsson

et al. 2014

Sci Rep

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Supramolecular interactions based on porphyrin and fullerene derivatives were successfully adopted to improve the photovoltaic performance of p-type dye-sensitized solar cells (DSCs). Photoelectron spectroscopy (PES) measurements suggest a change in binding configuration of ZnTCPP after co-sensitization with C60PPy, which could be ascribed to supramolecular interaction between ZnTCPP and C60PPy. The performance of the ZnTCPP/C60PPy-based p-type DSC has been increased by a factor of 4 in comparison with the DSC with the ZnTCPP alone. At 560 nm, the IPCE value of DSCs based on ZnTCPP/ C60PPy was a factor of 10 greater than that generated by ZnTCPP-based DSCs. The influence of different electrolytes on charge extraction and electron lifetime was investigated and showed that the enhanced V oc from the Co 21/31 (dtbp) 3 -based device is due to the positive E F shift of NiO. P-type dye-sensitized solar cells (DSCs) 1-10 have attracted intensive interest in the community due to the potential applications in tandem devices 11,12 with n-type DSCs 13 as well as in the artificial photosynthesis systems 14,15 . So far, the highest efficiency of p-type dye-sensitized solar cells is 1.3% obtained by the combination between an organic dye and a cobalt redox couple 16 . In DSCs, the photosensitizer is always one of the crucial components of the devices. To date, some organic as well as inorganic photosensitizers have been developed for p-type DSCs [2][3][4][5]12,[17][18][19][20][21] . In order to improve the photovoltaic properties of p-type DSCs, the recombination process between injected holes in the valence band (VB) of the p-type semiconductor and reduced photosensitizer should be inhibited as much as possible 4 . This problem can be addressed by judicious design of the photosensitizer, including extension of the conjugated system to increase the distance between the electron acceptor unit and the p-type semiconductor surface. This synthetic approach has been shown to provide a longer lifetime of the charge separated state 12,22 . Recently, a porphyrin dye showed a promising device efficiency up to 11%, a comparable efficiency to classic Ru photosensitizers that are ubiquitous in n-type DSC 23. These two points were the main motivations for using porphyrin dyes in p-type DSCs. Lindquist and co-workers adopted the mesotetra(carboxyphenyl) porphyrin (TCPP) for p-type DSCs in 1999 24 . However, at that moment the efficiency of the p-type DSCs based on this porphyrin dye was very unsatisfying, around 0.003%, with the highest incident photon-to-current conversion efficiency (IPCE) value of 0.24% at 540 nm. The poor photovoltaic properties were probably due to the fast hole recombination processes and the quality of the NiO films. Inspired by previous examples of supramolecular interaction between porphyrin and C60 and the fast charge transfer process from porphyrin to C60 derivatives [25][26][27][28][29] , a C60 derivative, N-methyl-2-(49-pyridyl)-3,4-fulleropyrrolidine (C60PPy) was adopted to carry out the formation of the supr...

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Section: Resultssupporting

confidence: 85%

Enhancement of p-Type Dye-Sensitized Solar Cell Performance by Supramolecular Assembly of Electron Donor and Acceptor

Tian

Oscarsson

Gabrielsson

et al. 2014

Sci Rep

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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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“…Very recently, large dendrimer architectures with up to 16 porphyrins (the second generation 85 is depicted in Figure 14) discussed before were also engaged in the coordination of fullerene spheres equipped with one pyridine function [55]. According to this, fulleropyrrolidine 84 bearing a pyridine has been obtained upon reaction of C 60 with p-pyridine carboxaldehyde applying Prato conditions.…”

mentioning

confidence: 99%

Synthetic Strategies towards Fullerene-Rich Dendrimer Assemblies

2012

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Abstract:The sphere-shaped fullerene has attracted considerable interest not least due to the peculiar electronic properties of this carbon allotrope and the fascinating materials emanating from fullerene-derived structures. The rapid development and tremendous advances in organic chemistry allow nowadays the modification of C 60 to a great extent by pure chemical means. It is therefore not surprising that the fullerene moiety has also been part of dendrimers. At the initial stage, fullerenes have been examined at the center of the dendritic structure mainly aimed at possible shielding effects as exerted by the dendritic environment and light-harvesting effects due to multiple chromophores located at the periphery of the dendrimer. In recent years, also many research efforts have been devoted towards fullerene-rich nanohybrids containing multiple C 60 units in the branches and/or as surface functional groups. In this review, synthetic efforts towards the construction of dendritic fullerene-rich nanostructures have been compiled and will be summarized herein.

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Multiple photosynthetic reaction centres composed of supramolecular assemblies of zinc porphyrin dendrimers with a fullerene acceptor

Cited by 73 publications

References 24 publications

Enhancement of p-Type Dye-Sensitized Solar Cell Performance by Supramolecular Assembly of Electron Donor and Acceptor

Enhancement of p-Type Dye-Sensitized Solar Cell Performance by Supramolecular Assembly of Electron Donor and Acceptor

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

Synthetic Strategies towards Fullerene-Rich Dendrimer Assemblies

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