C<sub>60</sub> Cluster as an Electron Shuttle in a Ru(II)-Polypyridyl Sensitizer-Based Photochemical Solar Cell

Kamat, Prashant V.; Haria, Mehul; Hotchandani, Surat

doi:10.1021/jp0496699

Cited by 159 publications

(121 citation statements)

References 24 publications

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“…For example, a C 60 - modified TiO 2 electrode was used in a dye-sensitized solar cell to facilitate the sensitizer regeneration by C 60 serving as an electron shuttle. [23] C 60 is a good electron acceptor, and the excited fullerene (C 60 *) is a better one. On the other hand, though C 60 may serve as a visible-light sensitizer, its ability to sensitize TiO 2 is highly restricted.…”

Section: Resultsmentioning

confidence: 99%

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Park

Singh

Kim

et al. 2009

Chemistry A European J

105

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The development of visible-light-active photocatalysts is being investigated through various approaches. In this study, C(60)-based sensitized photocatalysis that works through the charge transfer (CT) mechanism is proposed and tested as a new approach. By employing the water-soluble fullerol (C(60)(OH)(x)) instead of C(60), we demonstrate that the adsorbed fullerol activates TiO(2) under visible-light irradiation through the "surface-complex CT" mechanism, which is largely absent in the C(60)/TiO(2) system. Although fullerene and its derivatives have often been utilized in TiO(2)-based photochemical conversion systems as an electron transfer relay, their successful photocatalytic application as a visible-light sensitizer of TiO(2) is not well established. Fullerol/TiO(2) exhibits marked visible photocatalytic activity not only for the redox conversion of 4-chlorophenol, I(-), and Cr(VI), but also for H(2) production. The photoelectrode of fullerol/TiO(2) also generates an enhanced anodic photocurrent under visible light as compared with the electrodes of bare TiO(2) and C(60)/TiO(2), which confirms that the visible-light-induced electron transfer from fullerol to TiO(2) is particularly enhanced. The surface complexation of fullerol/TiO(2) induced a visible absorption band around 400-500 nm, which was extinguished when the adsorption of fullerol was inhibited by fluorination of the surface of TiO(2). The transient absorption spectroscopic measurement gave an absorption spectrum ascribed to fullerol radical cations (fullerol(*+)) the generation of which should be accompanied by the proposed CT. The theoretical calculation regarding the absorption spectra for the (TiO(2) cluster+fullerol) model also confirmed the proposed CT, which involves excitation from HOMO (fullerol) to LUMO (TiO(2) cluster) as the origin of the visible-light absorption.

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Section: Resultsmentioning

confidence: 99%

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Park

Singh

Kim

et al. 2009

Chemistry A European J

105

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“…[1][2][3][4][5][6][7][8][9][10][11][12] The most successful charge-transfer sensitizers employed in these cells are polypyridylruthenium complexes, which yield solar-to-electric power conversion efficiencies of 10-11 % with simulated sunlight. [13] In spite of this, the main drawback of ruthenium-based sensitizers is their lack of absorption in the red region of the visible spectrum.…”

mentioning

confidence: 99%

Efficient Sensitization of Nanocrystalline TiO₂ Films by a Near‐IR‐Absorbing Unsymmetrical Zinc Phthalocyanine

et al. 2006

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“…To this date, only one more example, in which fullerenes are implemented into the electrolyte, has been reported. 174 Here, fullerenes act as a secondary electron shuttle in I À /I 3 À based liquid electrolytes. The main impact is, however, the appreciable enhancement of the device photocurrents.…”

Section: Solid-state Electrolytes Based On Multifunctional Nanocarbonsmentioning

confidence: 99%

Recent advances in multifunctional nanocarbons used in dye-sensitized solar cells

Costa

Lodermeyer

Casillas

et al. 2014

Energy Environ. Sci.

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Throughout recent years the implementation of nanocarbons into dye-sensitized solar cells (DSSC) has resulted in important breakthroughs. The most relevant of them in this context are (i) the enhancement of charge transport and charge collection in nanocarbon-doped electrodes, (ii) the introduction of nanocarbon interlayers that simultaneously reduce the charge recombination and increase the charge collection efficiency, (iii) the use of nanocarbon-based, iodine-free, solid-state electrolytes featuring excellent diffusion coefficients and catalytic efficiencies, (iv) the use of novel nanocarbon-based hybrid dyes, and (v) the use of nanocarbons towards platinum-free counter electrodes. The first four aforementioned aspects are thoroughly described in this review. Broader contextThroughout recent years the implementation of nanocarbons into dye-sensitized solar cells (DSSC) has resulted in important breakthroughs. The most relevant of them in this context are (i) the enhancement of charge transport and charge collection in nanocarbon-doped electrodes, (ii) the introduction of nanocarbon interlayers that simultaneously reduce the charge recombination and increase the charge collection efficiency, (iii) the use of nanocarbon-based, iodine-free, solid-state electrolytes featuring excellent diffusion coefficients and catalytic efficiencies, (iv) the use of novel nanocarbon-based hybrid dyes, and (v) the use of nanocarbons towards platinum-free counter electrodes. The rst four aforementioned aspects are thoroughly described in this review.

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C₆₀ Cluster as an Electron Shuttle in a Ru(II)-Polypyridyl Sensitizer-Based Photochemical Solar Cell

Cited by 159 publications

References 24 publications

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Efficient Sensitization of Nanocrystalline TiO₂ Films by a Near‐IR‐Absorbing Unsymmetrical Zinc Phthalocyanine

Recent advances in multifunctional nanocarbons used in dye-sensitized solar cells

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C60 Cluster as an Electron Shuttle in a Ru(II)-Polypyridyl Sensitizer-Based Photochemical Solar Cell

Cited by 159 publications

References 24 publications

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Fullerol–Titania Charge‐Transfer‐Mediated Photocatalysis Working under Visible Light

Efficient Sensitization of Nanocrystalline TiO2 Films by a Near‐IR‐Absorbing Unsymmetrical Zinc Phthalocyanine

Recent advances in multifunctional nanocarbons used in dye-sensitized solar cells

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C₆₀ Cluster as an Electron Shuttle in a Ru(II)-Polypyridyl Sensitizer-Based Photochemical Solar Cell

Efficient Sensitization of Nanocrystalline TiO₂ Films by a Near‐IR‐Absorbing Unsymmetrical Zinc Phthalocyanine