Long afterglow phosphorescent characteristics of BaAl2O4:Eu,Dy films

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

“…XRD studies of barium-substituted samples revealed that at lower concentration of barium substitution (X Ba ¼ 0. 2+ , Dy 3+ exhibits both photoluminescence and afterglow luminescence at 505 nm [28]. Therefore, the shift in the emission peak from 490 nm to blue or green region could be due to the formation of BaAl 2 O 4 , SrAl 2 O 4 and SrAl 4 O 7 phases at different barium concentrations.…”

Red phosphorescence in Sr4Al14O25: Cr3+,Eu2+,Dy3+ through persistent energy transfer

“…3. 1, 12,13 Because the Cr 3+ replaces Al 3+ , there exist two types of Dy 3+ , one surrounded mainly by Al called Dy1, and the other by at least one near-neighbor Cr called Dy2. Owing to energy transfer, Cr 3+ activated persistent red phosphorescence has been observed besides the Eu 2+ acti- The phosphorescence spectra measured at 10 min after removal of exposure source are shown in Fig.…”

Fabrication and study of properties of the PLA/Sr2MgSi2O7:Eu2+, Dy3+ long-persistent luminescence composite thin films

“…LPL materials are usually prepared and investigated in the form of powders and films. LPL films have potential applications in many technological aspects, including displays [8], sensors for stress [9] and temperature [10,11], and so on. Because of the poor adhesion between the luminescence films and substrates, many high energy methods following annealing are chosen to prepare the luminescence films.…”