Interfacial electron transfer on TiO2 sensitized with an axially anchored trans tetradentate Ru(II) compound

Gajardo, Francisco; Leiva, Ana Marı́a; Loeb, Bárbara; Delgadillo, Álvaro; Stromberg, Jonathan R.; Meyer, Gerald J.

doi:10.1016/j.ica.2007.03.062

Cited by 22 publications

(18 citation statements)

References 30 publications

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“…In this regard, a trans-geometry is more preferred. 72 Stabilization of a trans-geometry generally requires covalently linking two diimine ligands so as to prevent trans ! cis photoisomerization.…”

Section: Ligand Field and Ligand Localized Excited Statesmentioning

confidence: 99%

Solar Photochemistry with Transition Metal Compounds Anchored to Semiconductor Surfaces

Meyer

2010

Physical Inorganic Chemistry

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There exists a critical need for sustainable power on a terawatt (TW ¼ 10 12 W) scale. 1,2 As the world's need for energy is related to the number of people on Earth, a staggering 45% population growth over the last quarter-century equates to roughly 2 billion people and a 6 TW ($63%) increase in needed power. 3 In addition, the urbanism of third-world and industrialized nations and cities has led to an increase in the demand for fuel that has driven gas and oil prices to record highs. 3 Regardless of price, the continued use of fossil fuels cannot be a long-term solution as they come from a limited stock and the deleterious environmental consequences of their combustion have become self-evident. 4,5 The increased average global temperature and rates of glacial melting measured over the past few decades are telling signs. [6][7][8][9] Concern should be elicited as ice-core data correlate temperature with greenhouse gas concentrations over the past half-a-million years. The present 380 ppm atmospheric CO 2 levels exceed any values attained over the same time period. 5,6 Further, other than natural photosynthesis, there exist no obvious means by which we can decrease today's level. Thus, population, energy demand, and fuel prices do not convey the severity of the need for sustainable energy.It is our belief that molecular assemblies, particularly molecules arranged at semiconductor interfaces, will one day efficiently harvest and convert energy from the Sun, thereby providing sustainable, carbon-neutral power for future generations. The Sun is in fact the only source that on its own can provide the TWs of power needed. It has been shown that the amount of solar energy reaching the Earth in one day could power the planet for an entire year. 7,8 Remaining is the important challenge of harvesting, converting, and storing this energy in a cost-effective way. Coordination Physical Inorganic Chemistry: Reactions, Processes, and Applications Edited by Andreja Bakac

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Section: Ligand Field and Ligand Localized Excited Statesmentioning

confidence: 99%

Solar Photochemistry with Transition Metal Compounds Anchored to Semiconductor Surfaces

Meyer

2010

Physical Inorganic Chemistry

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“…ruthenium and zinc) on nanocrystalline titanium dioxide films [4,[7][8][9][10]. Among the studied compounds, ruthenium(II)bipyridyl (N3, N719 and N749) complexes have proved to be the more efficient TiO 2 sensitizers [7][8][9][10][11][12][13][14]. This efficiency is measured by the power conversion index (η) and Grätzel cells based on the sensitization of TiO 2 by molecular dyes have a η among 7-11%.…”

Section: Introductionmentioning

confidence: 99%

“…In several studies it has been mentioned that the use of supramolecular interactions in solar cells is scarce [25][26][27][28]. Solar energy conversion efficiency (η) in photoelectrochemical cells is a function of several factors such as: the collection of electrons by the external circuit, the electron injection quantum yield (i.e., the ratio of injected electrons to absorbed photons), and the absorbance (the ratio of absorbed photons to incident photons) [10,11]. Dyes that support efficient intramolecular energy transfer (i.e., the antenna effect) can be designed to display broader absorption bands and/or absorption bands with high extinction molar coefficients [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Interaction of LD14 and TiO2 in dye-sensitized solar-cells (DSSC): A density functional theory study

Mendizábal

Lopéz

Arratia‐Pérez

et al. 2015

Computational and Theoretical Chemistry

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“…Grätzel's DSSCs are based on the adsorption of metallic complexes (e.g., ruthenium and zinc), which are usually termed "dyes" in this context, on nanocrystalline titanium dioxide films [9,[12][13][14][15][16][17][18][19]. Among the dye compounds studied, ruthenium(II) bipyridyl complexes have proven to be the most efficient TiO 2 sensitizers [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Among the dye compounds studied, ruthenium(II) bipyridyl complexes have proven to be the most efficient TiO 2 sensitizers [13][14][15][16][17]. The efficiency of a solar cell is measured by its power conversion index (η).…”

Section: Introductionmentioning

confidence: 99%

Interaction of YD2 and TiO2 in dye-sensitized solar cells (DSSCs): a density functional theory study

et al. 2015

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The interaction of the dye YD2 with a cluster of (anatase-phase) TiO2 (which is utilized in dye-sensitized solar cells, DSSCs) and electron injection by the dye into the cluster were studied by performing density functional theory (DFT) calculations at the B3LYP, PBE, and TPSS levels of theory, including dispersion effects. We studied and quantified the interaction of the metallomacrocycle with the TiO2 cluster and the electronic spectrum of the complex. TDDFT calculations using the B3LYP functional were found to be the most suitable for describing the observed absorption energy bands of YD2 and YD2-TiO2. Our calculations show that the diarylamino groups act as electron donors in the photon-induced injection that occurs in DSSCs. The free-energy changes that take place during electron injection support the good performance of YD2 on TiO2 clusters.

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Interfacial electron transfer on TiO2 sensitized with an axially anchored trans tetradentate Ru(II) compound

Cited by 22 publications

References 30 publications

Solar Photochemistry with Transition Metal Compounds Anchored to Semiconductor Surfaces

Solar Photochemistry with Transition Metal Compounds Anchored to Semiconductor Surfaces

Interaction of LD14 and TiO2 in dye-sensitized solar-cells (DSSC): A density functional theory study

Interaction of YD2 and TiO2 in dye-sensitized solar cells (DSSCs): a density functional theory study

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