Differences in adsorption behavior of N3 dye on flat and nanoporous TiO2 surfaces

Katoh, Ryuzi; Yaguchi, Kaori; Murai, Miki; Watanabe, Shuichi; Furube, Akihiro

doi:10.1016/j.cplett.2010.07.077

Cited by 11 publications

(12 citation statements)

References 15 publications

(18 reference statements)

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“…209 These complexes are characterized by a broad absorption band extending from the visible to the near infrared (NIR), excited and ground state energy levels matching the semiconductor CB energy levels and electrolyte's redox potential, respectively, coupled with IPCE over 80% in the visible region, high e, and electrochemical stability. 220 Similar spectral features are shown by N719 (e = 1.42 Â 10 4 M À1 cm À1 ). 36,83,219 The N3 dye is characterized by absorption maxima centred at 380 and 518 nm and a e = 1.35 Â 10 4 M À1 cm À1 in alkaline solution at 500 nm.…”

Section: Metal Complexessupporting

confidence: 59%

“…220 Similar spectral features are shown by N719 (e = 1.42 Â 10 4 M À1 cm À1 ). 218,[220][221][222] The development of new synthesis pathways has been the main strategy to improve the PV performance achieved with the N3 and N719 dyes. N3 and N719), thanks to its three SCN À functional groups, absorbs light from the visible to the NIR, showing a brown-black colour.…”

Section: Metal Complexessupporting

confidence: 59%

“…A strong research effort has been made to design many ruthenium-photosensitizers, characterized by different peripheral ligands and/or different numbers and types of anchoring groups. 225 More recently, a sensitizer built on tridentate bipyridine pyrazolate (bpz) ligand coupled Ru(II) complexes (coded as HY2), 226 with absorption peaks at 437 and 550 nm and e (=1.98 Â 10 4 M À1 cm À1 at 550 nm) higher than N3 (e = 1.35 Â 10 4 M À1 cm À1 ), 220 has been designed and synthesized. that influence the Z of DSSCs have been performed.…”

Section: Metal Complexesmentioning

confidence: 99%

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Vegetable-based dye-sensitized solar cells

et al. 2015

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There is currently a large effort to improve the performance of low cost renewable energy devices. Dye-sensitized solar cells (DSSCs) are emerging as one of the most promising low cost photovoltaic technologies, addressing "secure, clean and efficient solar energy conversion". Vegetable dyes, extracted from algae, flowers, fruit and leaves, can be used as sensitizers in DSSCs. Thus far, anthocyanin and betalain extracts together with selected chlorophyll derivatives are the most successful vegetable sensitizers. This review analyses recent progress in the exploitation of vegetable dyes for solar energy conversion and compares them to the properties of synthetic dyes. We provide an in-depth discussion on the main limitation of cell performance e.g. dye degradation, effective electron injection from the dye into the conduction band of semiconducting nanoparticles, such as titanium dioxide and zinc oxide, outlining future developments for the use of vegetable sensitizers in DSSCs. We also discuss the cost of vegetable dyes and how their versatility can boost the advancement of new power management solutions, especially for their integration in living environments, making the practical application of such systems economically viable. Finally, we present our view on future prospects in the development of synthetic analogues of vegetable dyes as sensitizers in DSSCs.

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Section: Metal Complexessupporting

confidence: 59%

Section: Metal Complexessupporting

confidence: 59%

Section: Metal Complexesmentioning

confidence: 99%

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Vegetable-based dye-sensitized solar cells

et al. 2015

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“…N3 ( fig. 3), for instance, has absorption maxima at 518 and 380 nm with a high value of  = 1.35*10 4 M -1 cm -1 in alkaline solution at 500nm (Katoh et al, 2010). N719, the partially deprotonated salt of N3, has near-identical properties (=1.42*10 -4 M -1 cm -1 ) (G.W.…”

Section: Ruthenium Dyesmentioning

confidence: 99%

“…Though in the original Grätzel article the large size of the dye molecule prevented complete saturation of chelation sites (O'Regan & Grätzel, 1991), dye molecules are typically on the order of 1 nm in diameter (Katoh et al, 2010), and thus are easily able to penetrate into the 2-50 nm pores characteristic of mesoporous materials. Moreover, further work is being done into alternative semiconductor morphologies such as anatase nanotubes that will increase dye access to adsorption sites.…”

Section: The Sensitizermentioning

confidence: 99%

Investigating New Materials and Architectures for Grätzel Cells

Polizzotti¹,

Schual-Berke²,

Falsgraf³

et al. 2012

Third Generation Photovoltaics

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Plasma Synthesis of Polymer‐Capped Dye‐Sensitised Anatase Nanopowders for Visible‐Light‐Driven Hydrogen Evolution

et al. 2012

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Visible-light-driven photocatalysis is currently attracting a great deal of attention because of its potential application in solar water splitting. However, the development of efficient and durable catalyst systems is still a challenging problem. In Ru dye-sensitised TiO(2) nanopowders, catalyst performances are found to decline as a result of poor bonding of the dye molecule to the TiO(2) surface and subsequent detachment and self-aggregation of the dye. Our strategy to improve the stability of the dye-TiO(2) interface is the encapsulation of the dye/TiO(2) assembly in an amino-group-containing polyallylamine layer anchored to TiO(2). A low-pressure pulsed microwave discharge plasma polymerization process was employed to coat a commercial anatase nanopowder with a thin polyallylamine layer to nanoconfine the adsorbed dye molecules. Electron microscopy and UV/Vis spectroscopy was carried out to characterise the resulting encapsulated nanostructures. The long-term stability of the new nanomaterial as the photoactive component of a water reduction catalyst system for H(2) evolution investigated in a slurry reactor under visible-light irradiation showed stable evolution rates over a period of several days.

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Differences in adsorption behavior of N3 dye on flat and nanoporous TiO2 surfaces

Cited by 11 publications

References 15 publications

Vegetable-based dye-sensitized solar cells

Vegetable-based dye-sensitized solar cells

Investigating New Materials and Architectures for Grätzel Cells

Plasma Synthesis of Polymer‐Capped Dye‐Sensitised Anatase Nanopowders for Visible‐Light‐Driven Hydrogen Evolution

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