منابع مشابه
Persistent luminescence in MSi2O2N2:Eu phosphors
In this work we study the persistent luminescence properties of europium-doped alkaline earth silicon oxynitrides (CaSi2O2N2, SrSi2O2N2 and BaSi2O2N2). All compounds show afterglow emission, with an emission spectrum which is similar to the steady state photoluminescence. The afterglow decay time for BaSi2O2N2:Eu and SrSi2O2N2:Eu is about 50 and 100 minutes respectively, while for CaSi2O2N2:Eu ...
متن کاملEffect of LiCl on the Microstructure and Luminescence Properties of YVO4:Eu3+ and YBO3:Eu3+ Phosphors
In this investigation, Eu3+ doped YVO4 /YBO3 phosphors were synthesized individually by conventional solid state method at 1100 °C under atmosphere condition. Meanwhile, different amounts of LiClwere used as the flux compound to modify the morphology of the phosphor particles and also final luminescence properties. It was concluded that even small amounts of fluxes play a vital role in the grow...
متن کاملLuminescence Properties of Eu and Mn Doped Sr2MgSiO5 Phosphors
Eu ions doped Sr2MgSiO5 phosphors, and EuMn ions-doped Sr2MgSiO5 phosphors were prepared via high-temperature solid state reaction method and sol-gel process, respectively. Luminescent mechanism and characteristics of all samples were studied. The results showed that lattice structure of Eu ion-doped Sr2MgSiO5 samples was pyramidal system. The influence of flux on luminescence properties of Eu ...
متن کاملLuminescence and luminescence quenching of highly efficient Y2Mo4O15:Eu3+ phosphors and ceramics
A good LED phosphor must possess strong enough absorption, high quantum yields, colour purity, and quenching temperatures. Our synthesized Y2Mo4O15:Eu(3+) phosphors possess all of these properties. Excitation of these materials with near-UV or blue radiation yields bright red emission and the colour coordinates are relatively stable upon temperature increase. Furthermore, samples doped with 50%...
متن کاملRare-Earth Activated Nitride Phosphors: Synthesis, Luminescence and Applications
Nitridosilicates are structurally built up on three-dimensional SiN4 tetrahedral networks, forming a very interesting class of materials with high thermomechanical properties, hardness, and wide band gap. Traditionally, nitridosilicates are often used as structural materials such as abrasive particles, cutting tools, turbine blade, etc. Recently, the luminescence of rare earth doped nitridosili...
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ژورنال
عنوان ژورنال: Nature
سال: 1954
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1731077a0