Role of Eu2+ and Dy3+ Concentration in the Persistent Luminescence of Sr2MgSi2O7 Glass-Ceramics

Abstract

In this study, glass-ceramics based on Sr2MgSi2O7 phosphor co-doped with Eu/Dy were obtained from the sintering and crystallisation of glass powders. The glasses were melted in a gas furnace to simulate an industrial process, and the dopant concentration was varied to optimise the luminescence persistence times. The doped parent glasses showed red emission under UV light excitation due to the doping of Eu3+ ions, while the corresponding glass-ceramics showed persistent blue emission corresponding to the presence of Eu2+ in the crystalline environment. The dopant concentration had a strong impact on the sintering/crystallisation kinetics affecting the final glass-ceramic microstructure. The microstructures and morphology of the crystals responsible for the blue emission were observed by scanning electron microscopy–cathodoluminescence. The composition of the crystallised phases and the distribution of rare-earth (RE) ions in the crystals and in the residual glassy phase were determined by X-ray diffraction and energy dispersive X-ray analysis. The emission and persistence of phosphorescence were studied by photoluminescence.

A Review of the Efficiency of White Light (or Other) Emissions in Singly and Co-Doped Dy3+ Ions in Different Host (Phosphate, Silicate, Aluminate) Materials

“…The next category of host materials for consideration in white light emission is through doping Dy 3+ ions with silicates. Silicates are easy to prepare and have excellent thermal and chemical stability [25]. The role of silicates in this scenario is for the generation of phosphorescence white light (t > 10 − 8 s) instead of fluorescence white light (t < 10 − 8 s) [4].…”

Preparation, optical, and thermal stability of Tb3+‐doped glass ceramics containing Al4Ti2SiO12

“…In formula (6), I 545 and I 483 represent the emission peak intensities of 5 D 4 → 7 F 5 and 5 D 4 → 7 F 6 , respectively. A, B, and C are the constant, T is the temperature.…”

“…4 The current commercial generation of green light is obtained by using diverse laser light wavelengths to excite rare earth ions-doped phosphors. However, some defects of phosphors themselves restrict their application, such as poor water resistance, [5][6][7] opaqueness, 8,9 aging of the encapsulation material leading to a short life cycle and other shortcomings, 10 so there is an urgent demand for the development of a new light-emitting material that can overcome the aforementioned issues.…”

Efficient Photopolymerization of Dental Resin Composites Using the Photoluminescent Long Afterglow of Sr2MgSi2O7:Eu2+,Dy3+

“…When the external light source is removed, these captured electrons could be released spontaneously to produce continuous luminescence . As a new generation of blue light long afterglow photoluminescent material, Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ (SMSED) has remarkable advantages over other luminescent materials in terms of the chemical and physical stability and afterglow time. − Meanwhile, it provides the possibility for the application of the material in the field of dental repair. Clinical studies indicate that CQ is the most common photoinitiator system in DRCs, whose light absorption band lies between 400 and 500 nm (λ max = 468 nm) .…”