Enhanced luminescence performance of Sr2MgSi2O7:Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions

Abstract

A series of rare earth doped and co-doped distrontium magnesium di-silicate phosphors namely: Sr 2 MgSi 2 O 7 :Ce 3? , Sr 2 MgSi 2 O 7 :Eu 2? and Sr 2 MgSi 2 O 7 :Eu 2? , Ce 3? were prepared by the solid state reaction method. The crystal structures of sintered phosphors were an akermanite type structure which belongs to the tetragonal crystallography. The chemical compositions of sintered phosphors were confirmed by energy dispersive X-ray spectroscopy (EDS). Under the ultraviolet excitation, the emission spectra of both Sr 2 MgSi 2 O 7 :Eu 2? and Sr 2 MgSi 2 O 7 :Eu 2? , Ce 3? phosphors were composed of a broad band peaking at 460 nm, belonging to the broad emission band. When the Sr 2 MgSi 2 O 7 :Eu 2? phosphor is co-doped with Ce 3? ions, thermouminescence, photoluminescence, afterglow and mechanoluminescence (ML) intensity were strongly enhanced. The Sr 2 MgSi 2 O 7 :Eu 2? phosphor showed some afterglow with short persistence time. Ce 3? phosphors were proportionally increased with the increase of impact velocity, which suggests that these phosphors can be used as sensors to detect the stress of an object. Thus the present investigation indicates that the piezoelectricity is responsible to produce ML in prepared phosphors.

Retracted: Studies on the luminescence properties of cerium co‐doping on Ca2MgSi2O7:Eu2+ phosphor by solid‐state reaction method

“…From Figure , it can be seen that ML intensity increases linearly with increasing impact velocity, i.e. the ML intensity of Ca 2 MgSi 2 O 7 :Ce 3+ , Ca 2 MgSi 2 O 7 :Eu 2+ and Ca 2 MgSi 2 O 7 :Eu 2+ ,Ce 3+ phosphors is lineally proportional to the magnitude of the impact velocity, suggesting that these phosphors could also be used as sensors to detect stress in an object …”

Luminescent properties of R+ doped Sr2MgSi2O7: Eu2+, Dy3+ (R+ = Li+, Ag+) phosphors

“…Many studies have examined the optical properties of rare earth (RE) doped Sr 2 MgSi 2 O 7 , for example, RE 3+ in Sr 2 MgSi 2 O 7 : Eu 2+ , the RE ions include Ce 3+ [8], Er 3+ [9], Nd 3+ [10], Tb 3+ [11], La 3+ [12], et al Another example is RE 3+ in Sr 2 MgSi 2 O 7 :…”

Processing and luminescence of Eu/Dy-doped Sr2MgSi2O7 glass-ceramics

“…16b shows the lifetime decay at different temperatures, until the sample stops emitting; the times are shown in Table 10. Several thermoluminescence studies of the Sr2MgSi2O7 phase are reported in the literature [43]. Initially, the intensity increases with temperature until a maximum value is reached for a given temperature, and then decreases with a further increase in temperature.…”