0000000000740858

AUTHOR

Stefano Boscarino

showing 4 related works from this author

TCO/Ag/TCO transparent electrodes for solar cells application

2014

Among transparent electrodes, transparent conductive oxides (TCO)/metal/TCO structures can achieve optical and electrical performances comparable to, or better than, single TCO layers and very thin metallic films. In this work, we report on thin multilayers based on aluminum zinc oxide (AZO), indium tin oxide (ITO) and Ag deposited by RF magnetron sputtering on soda lime glass at room temperature. The TCO/Ag/TCO structures with thicknesses of about 50/10/50 nm were deposited with all combinations of AZO and ITO as top and bottom layers. While the electrical conductivity is dominated by the Ag intralayer irrespective of the TCO nature, the optical transmissions show a dependence on the natur…

Soda-lime glassMaterials scienceTransparent electrode Electrodeschemistry.chemical_elementPhotovoltaic applicationrf-Magnetron sputteringMetalTransparent conductive oxideElectrical resistivity and conductivityAluminiumElectrical conductivityGeneral Materials ScienceElectrical performanceElectrical conductorbusiness.industryGeneral ChemistrySputter depositionElectrical and optical propertieITO glaIndium tin oxidechemistryvisual_artElectrodevisual_art.visual_art_mediumOptoelectronicsbusinessSilver Aluminum zinc oxideAluminum coatingMagnetron sputtering
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Ion irradiation of AZO thin films for flexible electronics

2017

Aluminum doped Zinc oxide (AZO) is a promising transparent conductor for solar cells, displays and touch-screen technologies. The resistivity of AZO is typically improved by thermal annealing at temperatures not suitable for plastic substrates. Here we present a non-thermal route to improve the electrical and structural properties of AZO by irradiating the TCO films with O+ or Ar+ ion beams (30–350 keV, 3 × 1015–3 × 1016 ions/cm2) after the deposition on glass and flexible polyethylene naphthalate (PEN). X-ray diffraction, optical absorption, electrical measurements, Rutherford Backscattering Spectrometry and Atomic Force Microscopy evidenced an increase of the crystalline grain size and a …

Nuclear and High Energy PhysicsMaterials science02 engineering and technology01 natural sciencesSettore ING-INF/01 - ElettronicaSettore FIS/03 - Fisica Della MateriaOpticsTransparent conductive oxideElectrical resistivity and conductivity0103 physical sciencesAZO ; Transparent conductive oxide ; Ion implantationElectrical measurementsThin filmPolyethylene naphthalateFlexible and transparent electronicInstrumentationTransparent conducting filmNuclear and High Energy Physic010302 applied physicsbusiness.industryAZO021001 nanoscience & nanotechnologyRutherford backscattering spectrometryIon implantationIon implantationOptoelectronicsCrystallite0210 nano-technologybusinessPhotovoltaic
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Laser irradiation of ZnO:Al/Ag/ZnO:Al multilayers for electrical isolation in thin film photovoltaics

2013

Laser irradiation of ZnO:Al/Ag/ZnO:Al transparent contacts is investigated for segmentation purposes. The quality of the irradiated areas has been experimentally evaluated by separation resistance measurements, and the results are complemented with a thermal model used for numerical simulations of the laser process. The presence of the Ag interlayer plays two key effects on the laser scribing process by increasing the maximum temperature reached in the structure and accelerating the cool down process. These evidences can promote the use of ultra-thin ZnO:Al/ Ag/ZnO:Al electrode in large-area products, such as for solar modules. © 2013 Crupi et al.; licensee Springer.

Materials scienceTransparent electrodesThin film photovoltaicNanochemistryNanotechnologyTransparent electrode AluminumSettore ING-INF/01 - ElettronicaSettore FIS/03 - Fisica Della Materialaw.inventionElectrical isolationIrradiated areaMaterials Science(all)PhotovoltaicslawTransparent electrodes ; Multilayers; Pulsed laser scribingMultilayerGeneral Materials ScienceIrradiationThin filmLaser scribingNano Expressbusiness.industryMaximum temperaturePulsed laser scribingCondensed Matter PhysicsLaserThin film photovoltaicsMultilayersElectrical isolationElectrodeOptoelectronicsResistance measurementLaser scribing proceZinc oxide Film preparationbusinessLaser scribing
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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
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