Search results for "doped ZnO"

showing 6 items of 6 documents

Optimization of ZnO:Al/Ag/ZnO:Al structures for ultra-thin high-performance transparent conductive electrodes

2012

Al-doped ZnO (AZO)/Ag/AZO multilayer coatings (50-70 nm thick) were grown at room temperature on glass substrates with different silver layer thickness, from 3 to 19 nm, by using radio frequency magnetron sputtering. Thermal stability of the compositional, optical and electrical properties of the AZO/Ag/AZO structures were investigated up to 400 °C and as a function of Ag film thickness. An AZO film as thin as 20 nm is an excellent barrier to Ag diffusion. The inclusion of 9.5 nm thin silver layer within the transparent conductive oxide (TCO) material leads to a maximum enhancement of the electro-optical characteristics. The excellent measured properties of low resistance, high transmittanc…

High transmittanceDiffusionrf-Magnetron sputteringElectro-optical characteristicGlass substrateTransparent conductive oxide RF magnetron sputtering Optical properties Electrical resistivity Al-doped zinc oxide Silver MultilayersSettore ING-INF/01 - ElettronicaSUBSTRATE-TEMPERATUREAg diffusionAl-doped ZnOLow resistanceMultilayerZNOMaterials ChemistryVisible spectral rangeMULTILAYER FILMSAl-doped zinc oxideOptical propertiesMetals and AlloysAZO filmElectrical resistivityOPTICAL-PROPERTIESOXIDE-FILMSSurfaces and InterfacesZinc oxide AluminumRadio frequency magnetron sputteringSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsOptical and electrical propertieElectrodeOptoelectronicsFilm preparationLayer (electronics)Magnetron sputteringUltra-thinRF magnetron sputteringMaterials scienceSilverThermodynamic stabilityOpticsTransparent conductive oxideElectrical resistivity and conductivityThermal stabilityElectrical conductorTransparent conducting filmRoom temperatureThin film solar cellbusiness.industryTransparent conductiveOptical propertieSilver layerHigh transmittanceMultilayersMulti-layer-coatingZnO Electric conductivityMeasured propertiebusinessSubstrate
researchProduct

Influence of Ag, Cu dopants on the second and third harmonic response of ZnO films

2009

International audience; Silver- and copper-doped ZnO films were prepared by radio-frequency (RF)-magnetron sputtering on glass and quartz substrates. The influence of dopants content on the microstructural evolution and optical as well as nonlinear optical (NLO) properties were investigated. It has been found that the grain sizes were enlarged with increasing of Ag, Cu dopants amount in ZnO films. The Ag or Cu doping leads to the optical band gap narrowing. Besides, the second-order NLO response of Ag- and Cu-doped ZnO films is lower than that of undoped ZnO film. The second harmonic generation (SHG) efficiency of the ZnO:Ag film was found to be higher than that of the ZnO:Cu film at the si…

Materials scienceBand gapSilver-doped ZnO film Copper-doped ZnO film RF-magnetron sputtering SHG THG[SDV]Life Sciences [q-bio]Analytical chemistryMineralogy02 engineering and technology01 natural sciencesSHGTHGCopper-doped ZnO filmSputtering0103 physical sciencesMaterials Chemistry010302 applied physicsDopantMechanical EngineeringDopingMetals and AlloysNonlinear opticsSecond-harmonic generation021001 nanoscience & nanotechnologyMicrostructureGrain sizeMechanics of MaterialsSilver-doped ZnO filmRF-magnetron sputtering0210 nano-technology
researchProduct

The influence of Al doping on the photocatalytic activity of nanostructured ZnO: The role of adsorbed water

2018

Abstract Al doped ZnO nanoparticles (labeled as x% A-ZnO, x = 0.0, 0.5, 1.0, and 1.5) were synthesized by a simple sol-gel method, characterized and tested as photocatalysts for the degradation of a model compound under UV-light irradiation. Diffuse reflectance spectroscopy (DRS) and photoelectrochemical analysis have been performed to evidence their optical and electronic behavior. The structural features of the powders were highlighted by means of specific surface area (SSA) analysis, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) and Raman spectroscopy. Al doping results in enhanced photocatalytic activity of the modified powders with respect to pure ZnO. In particular, the h…

Materials scienceDiffuse reflectance infrared fourier transformBand gapAdsorbed water; Al-doped ZnO; Defects; Nanoparticles; Photocatalysis; Sol-gel; ZnO; Surfaces; Coatings and FilmsSettore AGR/13 - Chimica AgrariaGeneral Physics and Astronomy02 engineering and technology010402 general chemistry01 natural sciencesCoatings and Filmssymbols.namesakeNanoparticlePhotocatalysiAl-doped ZnOAdsorptionSpecific surface areaPhotocatalysisFourier transform infrared spectroscopySol-gelAdsorbed waterDopingSurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesSurfaces Coatings and FilmsSurfacesAdsorbed water; Al-doped ZnO; Defects; Nanoparticles; Photocatalysis; Sol-gel; ZnO; Surfaces Coatings and FilmsSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiChemical engineeringZnOPhotocatalysissymbolsNanoparticlesDefectsDefect0210 nano-technologyRaman spectroscopyApplied Surface Science
researchProduct

Changes in structure and conduction type upon addition of Ir to ZnO thin films

2017

Zn-Ir-O (Zn/Ir ≈ 1/1) thin films have been reported to be a potential p-type TCO material. It is, however, unknown whether it is possible to achieve p-type conductivity at low Ir content, and how the type and the magnitude of conductivity are affected by the film structure. To investigate the changes in properties taking place at low and moderate Ir content, this study focuses on the structure, electrical and optical properties of ZnO:Ir films with iridium concentration varying between 0.0 and 16.4 at.%. ZnO:Ir thin films were deposited on glass, Si, and Ti substrates by DC reactive magnetron co-sputtering at room temperature. Low Ir content (up to 5.1 at.%) films contain both a nano-crysta…

Materials scienceThin filmsAnalytical chemistrychemistry.chemical_element02 engineering and technologyConductivity010402 general chemistryIridium01 natural sciencesIonCrystallinityElectrical resistivity and conductivityMaterials Chemistry:NATURAL SCIENCES:Physics [Research Subject Categories]IridiumThin filmAmorphous doped ZnOMetals and AlloysSurfaces and Interfaces021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsAmorphous solidchemistryCrystallite0210 nano-technologyReactive DC magnetron co-sputtering
researchProduct

Structural, Superficial and Optical Properties of Nanostructured Polycrystalline ZnO:X (Cu, Ag) Films

2010

doped ZnO
researchProduct

Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

2018

Transparent ZnO ceramics are of interest for use as material for high-efficiency fast scintillators. Doping ZnO ceramics in order to improve complex of their properties is a promising direction. In the present research, the role of indium in the ZnO nanopowders surface interactions and in the change of microstructures and photoluminescence (PL) characteristics of sintered cera-mics is considered. Undoped and 0.13 wt% In doped ZnO ceramics are obtained by hot pressing sintering. It has been found that indium leads to the transition of initially faceted ZnO particles to rounded, contributing to good sintering with formation of diffusion active grain boundaries (GBs). Unlike ZnO ceramics, ZnO:…

in doped zno ceramicsPhotoluminescenceMorphology (linguistics)hot pressing sinteringZnO powdersQC1-999General Physics and Astronomy02 engineering and technologyScintillator010402 general chemistry01 natural sciences:NATURAL SCIENCES:Physics [Research Subject Categories]CeramicComposite materialIn doped ZnO ceramicsPhysicsDopingGeneral Engineeringgrain boundaries021001 nanoscience & nanotechnologyMicrostructure0104 chemical sciencesvisual_artvisual_art.visual_art_mediumGrain boundaryphotoluminescence0210 nano-technologyzno powdersLatvian Journal of Physics and Technical Sciences
researchProduct