Design of antenna-sensitizer polynuclear complexes. Sensitization of titanium dioxide with [Ru(bpy)2(CN)2]2Ru(bpy(COO)2)22-

Амаделли, Р.; Argazzi, Roberto; Bignozzi, Carlo Alberto; Scandola, Franco

doi:10.1021/ja00176a003

Cited by 284 publications

(165 citation statements)

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“…where ~/is the inter-system crossing efficiency (from singlet to triplet states), which is thought to be unity for the Rubpy dyes [13,18]. Similarly, the photoluminescence efficiency of the free dye is given by ~free = r/kr~'0 = rlkr/(kr + knr)" (3) The measured lifetime of the free dye, T 0, in ethanol is [13,16] 320 ns, and the measured photoluminescence efficiency is 5 × 10 -3.…”

Section: Discussion Of Photoluminescencementioning

confidence: 99%

“…Similarly, the photoluminescence efficiency of the free dye is given by ~free = r/kr~'0 = rlkr/(kr + knr)" (3) The measured lifetime of the free dye, T 0, in ethanol is [13,16] 320 ns, and the measured photoluminescence efficiency is 5 × 10 -3. One thus obtains k r = 1.6 × 104 s -1 and knr = 3.3 × 106 s -1 from Eq.…”

Section: Discussion Of Photoluminescencementioning

confidence: 99%

“…The titanium butoxide solution used in the pre-coating step was also found to substitute well for the TiCI 4 if it was allowed to react on the colloidal film for only 1 min. The completed TiO 2 coated substrate was then broken into 1 × 1 cm pieces, and plunged while still warm into a 5 x 10 -5 M ethanol solution of the ruthenium trinuclear dye [13]. The colloidal TiO 2 film, shown in Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…To prepare the dye [13][14][15][16], Ru(dcbH2)2C12 (0.2 g, 0.3 mmol) was dissolved in 10 ml of water adjusted to pH 7 by the addition of NaOH. The symbols (dcbH 2) and (bpy) represent the 2,2'bipyridil-4,4'dicarboxylic acid and the 2,2'bipyridil ligands, respectively.…”

Section: Ru Trinuclear Dye Anionic Formmentioning

confidence: 99%

“…The complex displays a solvatochromic behavior due to the presence of the two terminal cyanide ligands. The most intense absorption band, at 480 nm, is attributed to metal to ligand charge transfer transitions, MLCT, localized on the external NC-Ru(bpy)2-CN units, and is blue shifted to 420 nm in water [13]. The intense shoulder at 520 nm is assigned to MLCT transitions on the Ru(dcb) unit [13], while the weaker absorption is probably due to spin forbidden transitions to 3MLCT states, being that this band is near the energy of the onset of the emission spectra (see Fig.…”

Section: Ru Trinuclear Dye Anionic Formmentioning

confidence: 99%

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Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Smestad

Bignozzi²,

Argazzi³

1994

Solar Energy Materials and Solar Cells

321

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Recently, a paper was published by the Lausanne Group headed by Dr. M. Graetzel which reported a simple low cost 7% efficient photo electrochemical solar cell made from a trinuclear Ru dye complex adsorbed on the very rough surface of a colloidal TiO 2 film. In the current paper, a verification of this result is presented using procedures described in the literature. Measurements are reported in simulated and natural sunlight which confirm that the efficiency is indeed in the range previously reported. Predicted Air Mass 1.5 photo currents are compared to those obtained from fabricated dye sensitized cells. Although current densities of 12 mA/cm 2 and voltages of over 0.6 V are measured, it is found that corresponding fill factors, less than 0.6, limit the performance of the cell under solar illumination. The basic economics of such a device are outlined and it is proposed that cell costs of $ 0.6 per peak watt could be possible if the longevity of the cell is at least 15 years.

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Section: Discussion Of Photoluminescencementioning

confidence: 99%

Section: Discussion Of Photoluminescencementioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Ru Trinuclear Dye Anionic Formmentioning

confidence: 99%

Section: Ru Trinuclear Dye Anionic Formmentioning

confidence: 99%

See 3 more Smart Citations

Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Smestad

Bignozzi²,

Argazzi³

1994

Solar Energy Materials and Solar Cells

321

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Perspectives for dye-sensitized nanocrystalline solar cells

Grätzel

2000

Prog. Photovolt: Res. Appl.

666

217

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The dye‐sensitized solar cells (DYSC) provides a technically and economically credible alternative concept to present day p–n junction photovoltaic devices. In contrast to the conventional systems, where the semiconductor assumes both the task of light absorption and charge carrier transport, the two functions are separated here. Light is absorbed by a sensitizer which is anchored to the surface of a wide band gap semiconductor. Charge separation takes place at the interface via photo‐induced electron injection from the dye into the conduction band of the solid. Carriers are transported in the conduction band of the semiconductor to the charge collector. The use of transition metal complexes having a broad absorption band in conjunction with oxide films of nanocrystalline morphology permits the harvesting of a large fraction of sunlight. Near‐quantitative conversion of incident photons into electric current is achieved over a large spectral range extending over the whole visible region. Overall solar (standard AM1·5) to electric conversion efficiencies over 10% have been reached. There are good prospects for producing these cells at a lower cost than conventional devices. Here we present the current state of the field. We shall discuss new concepts of the dye‐sensitized nanocrystalline solar cell (DYSC), including solid heterojunction variants, and analyze the perspectives for future development of the technology into the next millennium. Copyright © 2000 John Wiley & Sons, Ltd.

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Photo–Initiated Electron–Transfer at the Interface between AnataseTiO₂Nanocrystallites and Transition–Metal Polypyridyl Compounds: Recent Advances

Ardo

Meyer

2005

Encyclopedia of Inorganic Chemistry

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Molecular control of solar light harvesting and interfacial charge transfer at mesoporous, nanocrystalline semiconductor thin films are described. Light absorption by transition‐metal coordination compounds anchored to wide band‐gap semiconductors can initiate electron‐transfer processes that ultimately reduce the semiconductor and oxidize the coordination compound. Such photo‐induced charge separation is a key step for solar energy conversion. Three different interfacial charge‐separation mechanisms are discussed in addition to regeneration processes wherein a mobile donor donates an electron to the oxidized coordination compound. Inorganic chemistry plays a central role in this approach to solar energy conversion, which may ultimately be optimized for practical applications.

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Design of antenna-sensitizer polynuclear complexes. Sensitization of titanium dioxide with [Ru(bpy)2(CN)2]2Ru(bpy(COO)2)22-

Cited by 284 publications

References 0 publications

Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Perspectives for dye-sensitized nanocrystalline solar cells

Photo–Initiated Electron–Transfer at the Interface between AnataseTiO₂Nanocrystallites and Transition–Metal Polypyridyl Compounds: Recent Advances

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Design of antenna-sensitizer polynuclear complexes. Sensitization of titanium dioxide with [Ru(bpy)2(CN)2]2Ru(bpy(COO)2)22-

Cited by 284 publications

References 0 publications

Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Testing of dye sensitized TiO2 solar cells I: Experimental photocurrent output and conversion efficiencies

Perspectives for dye-sensitized nanocrystalline solar cells

Photo–Initiated Electron–Transfer at the Interface between AnataseTiO2Nanocrystallites and Transition–Metal Polypyridyl Compounds: Recent Advances

Contact Info

Product

Resources

About

Photo–Initiated Electron–Transfer at the Interface between AnataseTiO₂Nanocrystallites and Transition–Metal Polypyridyl Compounds: Recent Advances