Luminescence Temperature Quenching in Mn ²⁺ Phosphors

Luminescence 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 ...

Luminescence 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%...

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 ...

Luminescence quenching in erbiumdoped hydrogenated amorphous silicon

Luminescence Spectra of Mn 2 + Doped in

Luminescence data for 6 manganese doped langbeinites, Aj B2 + (S04)3 , are reported. They are consistent with octahedral symmetry of the impurity center (substitutional in B site), although for the host lattice the B site is known to show three-fold axial (distorted octahedral) symmetry only. In accordance with previous conclusions from EPR data the luminescence parameters indicate structural r...