Long-lasting phosphorescence of Eu2+ in melilite

Effects of non-stoichiometry and substitution on photoluminescence and afterglow luminescence of Sr4Al14O25:Eu2+, Dy3+ phosphor

“…Therefore, these materials, also known as long-lasting afterglow materials, are used for emergency displays, decorative purposes, background lighting, traffic signs, and escape route indicators. Recent studies have brought out many such phosphors like Eu 2+ , Dy 3+ -doped alkaline earth aluminates [1][2][3], Tb 3+ , Ce 3+ -doped alkaline earth aluminates [4], Eu 2+ , Dy 3+ and Eu 2+ , Ce 3+ -doped alumino silicates [5][6][7][8], Dy 3+ -doped strontium silicate [9], Eu 2+ , Pr 3+ -doped calcium sulfide [10], Pr 3+ , Li + -doped calcium zirconate [11], etc. However, among all these phosphors the Eu 2+ , Dy 3+ -doped alkaline earth aluminates are the most suitable phosphors due to their long persistence time and bright afterglow.…”

Luminescent properties of Eu2+-activated SrLaGa3S6O phosphor

“…Malinowski et al [15] have studied the spectroscopy properties of Dy 3+ -doped SrLaGa 3 O 7 crystals. Long-lasting phosphorescences have also been reported recently in CaYAl 3 O 7 :Ce 3+ (CYAM) [16,17], CaYAl 3 O 7 :Eu 2+ , Dy 3+ [18] and CaGdAl 3 O 7 :Eu 2+ , Dy 3+ [18] melilite crystals. Flahaut and co-workers [19] have shown that the thiogallates MLaGa 3 S 7 (M = Ca, Sr) and La 5/3 Ga 3 S 7 have the structure of melilite.…”

Photoluminescence of Eu single doped and Eu/Dy codoped Sr2Al2SiO7 phosphors with long persistence

“…Therefore the silicate-based long afterglow phosphors are regarded as one of the promising materials in the field. Eu 2+ and Ce 3+ caused long-lasting behavior in melilites together with their afterglow mechanism, were reported in recent years by several groups [15][16][17][18][19], showing the potential research interest in rare-earth-doped melilite materials. However, when compared to the achievements researchers made in aluminate system, works in silicate system need further investigation.…”