Search results for "time resolved photoluminescence"

showing 4 items of 4 documents

Temperature dependent optical properties of stacked InGaAs/GaAs quantum rings

2008

4 páginas, 3 figuras, 2 tablas.-- MADICA 2006 Conference, Fifth Maghreb-Europe Meeting on Materials and their Applicatons for Devices and Physical, Chemical and Biological Sensors

Materials sciencePhotoluminescenceAtmospheric escapeTime resolved photoluminescenceExcitonBioengineeringThermionic emissionActivation energyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectBiomaterialsCondensed Matter::Materials ScienceMechanics of MaterialsExcited stateQuantum ringsVertical stacksAtomic physicsQuantumRecombination
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Luminescence mechanisms of defective ZnO nanoparticles.

2016

ZnO nanoparticles (NPs) synthesized by pulsed laser ablation (PLAL) of a zinc plate in deionized water were investigated by time-resolved photoluminescence (PL) and complementary techniques (TEM, AFM, μRaman). HRTEM images show that PLAL produces crystalline ZnO NPs in wurtzite structure with a slightly distorted lattice parameter a. Consistently, optical spectra show the typical absorption edge of wurtzite ZnO (Eg = 3.38 eV) and the related excitonic PL peaked at 3.32 eV with a subnanosecond lifetime. ZnO NPs display a further PL peaking at 2.2 eV related to defects, which shows a power law decay kinetics. Thermal annealing in O2 and in a He atmosphere produces a reduction of the A1(LO) Ra…

Materials sciencePhotoluminescenceGeneral Physics and AstronomyNanotechnology02 engineering and technologyElectrontime resolved photoluminescence010402 general chemistry01 natural sciencessymbols.namesakeLattice constantPhysical and Theoretical ChemistryHigh-resolution transmission electron microscopyRamanFIS/03 - FISICA DELLA MATERIAWurtzite crystal structurebusiness.industrySettore FIS/01 - Fisica Sperimentale021001 nanoscience & nanotechnology0104 chemical sciencesAbsorption edgeZnO nanoparticles laser ablation Luminescence microscopy excitons defectssymbolsTEMZnOOptoelectronicsoxide nanoparticle0210 nano-technologybusinessRaman spectroscopyLuminescencePhysical chemistry chemical physics : PCCP
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Luminescence of natural α-quartz crystal with aluminum, alkali and noble ions impurities

2019

This work was supported by the Latvian Science Council Grant No lzp-2018/1–0289 .

Materials sciencePhotoluminescenceOptically stimulated luminescenceTime resolved photoluminescenceBiophysicsAnalytical chemistrychemistry.chemical_element010502 geochemistry & geophysicsThermal quenching01 natural sciencesBiochemistryIonα-quartz0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Spontaneous emissionAluminum-one-valence ions complex0105 earth and related environmental sciences010302 applied physicsCondensed Matter - Materials ScienceGeneral ChemistryCondensed Matter PhysicsAlkali metalCopperAtomic and Molecular Physics and OpticschemistryAtomic electron transitionLuminescenceExcimer lasers
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Luminescence of localized states in oxidized and fluorinated silica glass

2019

This work was supported by the Latvian Science Council Grant No lzp-2018/1-0289.

Materials sciencePhotoluminescenceRecombination luminescenceTime resolved photoluminescencePhysics::OpticsFOS: Physical sciences02 engineering and technologyLocalized statesPhotochemistryExcimer01 natural sciencesCondensed Matter::Disordered Systems and Neural Networkslaw.inventionlaw0103 physical sciencesMaterials Chemistry:NATURAL SCIENCES:Physics [Research Subject Categories]Pure silica glass010302 applied physicsCondensed Matter - Materials ScienceSelf-trapped holeMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnologyCondensed Matter PhysicsLaserElectronic Optical and Magnetic MaterialsAtomic electron transitionAttenuation coefficientCeramics and CompositesCharge carrier0210 nano-technologyLuminescenceExcitationOxygen deficient centersExcimer lasers
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