Search results for "TiO2 films"

showing 3 items of 3 documents

Cobalt Electrolyte/Dye Interactions in Dye-Sensitized Solar Cells: A Combined Computational and Experimental Study

2012

We report a combined experimental and computational investigation to understand the nature of the interactions between cobalt redox mediators and TiO2 surfaces sensitized by :ruthenium and organic dyes, and their impact on. the performance of the corresponding dye-sensitized solar cells (DSSCs). We : focus: on different ruthenium dyes and fully organic dyes, to understand the dramatic loss of efficiency observed for the prototype Ru(II) N719 dye in conjunction with :Cobalt: electrolytes. Both N719- and Z907-based DSSCs showed an increased lifetime in iodine-based electrolyte compared to the cobalt-based redox-shuttle; While the organic D21L6 and D25L6 cycles endowed.With long alkoxy chains,…

COLLOIDAL TIO2 FILMSinorganic chemicalsLOW QUANTUM YIELDSInorganic chemistrychemistry.chemical_element02 engineering and technologyElectrolyte010402 general chemistryPhotochemistry01 natural sciencesBiochemistryRedoxREDOX COUPLECatalysisEFFECTIVE CORE POTENTIALSDENSITY-FUNCTIONAL THEORYColloid and Surface ChemistryDENSITY-FUNCTIONAL THEORY; EFFECTIVE CORE POTENTIALS; INTRAMOLECULAR ELECTRON-TRANSFER; TRANSITION-METAL-COMPLEXES; COLLOIDAL TIO2 FILMS; LOW QUANTUM YIELDS; MOLECULAR CALCULATIONS; REDOX COUPLE; MAGNETIC-PROPERTIES; PHOTOVOLTAIC CELLSMAGNETIC-PROPERTIESPHOTOVOLTAIC CELLSLigandGeneral Chemistry021001 nanoscience & nanotechnologyMOLECULAR CALCULATIONSTRANSITION-METAL-COMPLEXES0104 chemical sciencesMarcus theoryRutheniumDye-sensitized solar cellchemistryAlkoxy groupINTRAMOLECULAR ELECTRON-TRANSFER0210 nano-technologyCobalt
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Scanning tunneling microscopy and spectroscopy of Mo clusters grown on TiO2(110).

2007

Molybdenum was deposited in two steps (3 eq. ML and 1 eq. ML) on the light blue rutile TiO2 10) (1 x 1) surface at room temperature, each Mo deposition cycle being followed by an annealing up to 950-1000 K. This procedure was found to lead to formation of separated clusters having a size in very wide range (1-20 nm). Scanning tunneling microscopy showed a dependence of the cluster morphology as a function of the size. The scanning tunneling spectra of Mo clusters was studied as a function of cluster dimensions and discussed in comparison with photoelectron spectroscopy results previously obtained for homogeneous Mo films. The dI/d V curves do not display the valence band structure of deposi…

SURFACEAnnealing (metallurgy)Schottky barrierScanning tunneling spectroscopyAnalytical chemistrychemistry.chemical_element02 engineering and technologyGrowth01 natural scienceslaw.inventionX-ray photoelectron spectroscopylaw0103 physical sciencesmorphologyMaterials ChemistryCluster (physics)GOLD010306 general physicsSpectroscopyroughnessMolybdenumNANOPOROUS TIO2 FILMSTitanium oxideScanning tunnelling spectroscopiesSurface structureSurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter PhysicsSurfaces Coatings and FilmsCrystallographyScanning tunnelling microscopyand topographychemistryMolybdenumScanning tunneling microscope0210 nano-technology
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State selective electron injection in non-aggregated titanium phthalocyanine sensitised nanocrystalline TiO2 films

2004

We describe a novel titanium phthalocyanine that shows no aggregation when anchored to nanocrystalline TiO2 films through its axial carboxylated ligand without the use of co-adsorbents; state selective electron injection into the TiO2 is demonstrated, resulting in efficient photocurrent generation in dye sensitised photoelectrochemical solar cells. Palomares Gil, Emilio J, epagil@alumni.uv.es

Solar cellsMaterials scienceState selectiveUNESCO::QUÍMICAchemistry.chemical_elementNanotechnologyPhotochemistry:QUÍMICA [UNESCO]Catalysischemistry.chemical_compoundElectron injectionMaterials ChemistryUNESCO::QUÍMICA::Química orgánicaElectron injectionPhotocurrentTitaniumLigand:QUÍMICA::Química orgánica [UNESCO]Metals and AlloysGeneral ChemistryNanocrystalline materialSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialschemistryTiO2 filmsCeramics and CompositesPhthalocyanineElectron injection ; Titanium ; TiO2 films ; Solar cellsTitanium
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