Photoluminescence properties of Ba2ZnSi2O7:Eu2+, Re3+ (Re=Dy, Nd) long lasting phosphors prepared by the combustion-assisted synthesis method

Synthesis and characterization of blue long‐lasting BaCa2Al8O15:Eu2+, Dy3+ phosphor

“…It is worth noting that, rare earth Dy as a co‐activator added to BaCa 2 Al 8 O 15 :Eu 2+ also gave the only blue broadband emission and no characteristic emission of the co‐activators themselves. These observations are in a good agreement with results described in the literature . In BaCa 2 Al 8 O 15 :Eu 2+ ,Dy 3+ phosphor, Eu 2+ ions are the luminescent centers, photo‐excited luminescence is considered to be due to transition from the 5d level to the 4f level of Eu 2+ and holes in the traps are responsible for the long afterglow.…”

Persistent luminescence in rare earth ion-doped gadolinium oxysulfide phosphors

“…Since then, oxide-based LLP materials, especially aluminate-base and silicate-base luminescent host lattices which can be used for glass components, have attracted more and more attention and have been developed rapidly to replace the conventional long-lasting phosphorescent materials [9][10][11][12][13][14][15]. The brightness and persistent time of these new phosphors are more than 10 times longer than that of the previous sulfides, and remain visible well over 10 h after UV excitation.…”

THE LUMINESCENCE AND THERMOLUMINESCENCE STUDIES OF Nd3+ DOPED Sr2SiO4

“…Yamaga et al reported that upon UV excitation electrons and holes were produced in the crystal via thermal hopping and tunneling moved back to Eu 2+ sites where Eu 2+ recombined radiatively [4]. In 2010, Yao et al, who studied the photoluminescence properties of Ba2ZnSi2O7:Eu 2+ ,Re 3+ (Re = Dy, Nd) prepared via the combustion-assisted synthesis (CAS) technique, reported that the single band centered at 503 nm in the emission spectrum corresponding to the 4f 6 5d 1 →4f 7 transition of Eu 2+ is obtained when Dy 3+ and Nd 3+ ions were doped into Ba2ZnSi2O7:Eu phosphors giving blue-green afterglow with emission wavelength at ʎem =503 nm [5].…”