Search results for " Praseodimium"

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Particle size-related limitations of persistent phosphors based on the doped Y3Al2Ga3O12 system

2021

AbstractCo-doped Ce3+, Cr3+ and Pr3+ yttrium–aluminium–gallium garnet powders of various sizes were obtained by co-precipitation method. The microstructure and morphology were investigated by XRPD, TEM and gas porosimetry. The luminescence properties were studied by excitation and emission spectra, quantum yield and decay times. Thermoluminescence measurements were performed to evaluate the activation energy, traps redistribution and frequency factor. Limitation in the energy transfer between dopant ions in the small particles, traps depth and surface defects were considered and investigated as responsible for the quenching of persistent luminescence. The phosphors annealed at 1100 °C show …

QuenchingMultidisciplinaryMaterials scienceDopantScienceDopingQAnalytical chemistryRPhysics::OpticsPhosphor02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesThermoluminescence0104 chemical sciencesCondensed Matter::Materials SciencePersistent luminescenceyttrium–aluminium–gallium garnet Persistent Luminescence PraseodimiumPhysics::Atomic and Molecular ClustersMedicineParticle size0210 nano-technologyLuminescence

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