6533b85efe1ef96bd12bfd6e
RESEARCH PRODUCT
Particle size-related limitations of persistent phosphors based on the doped Y3Al2Ga3O12 system
Cecilia MortalòVitalii BoikoZhengfa DaiDariusz HreniakMarta MarkowskaMaria Luisa SaladinoCristina LeonelliFederica UrsiFrancesco ArmettaGiorgio Nasillosubject
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-technologyLuminescencedescription
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 the optimal persistent luminescence and nano-particle size.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-01-08 |