Role of Eu2+ and Dy3+ Concentration in the Persistent Luminescence of Sr2MgSi2O7 Glass-Ceramics
Open Access
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.Keywords
This publication has 26 references indexed in Scilit:
- Luminescent probes and sensors for temperatureChemical Society Reviews, 2013
- Synthesis and luminescence properties of glass ceramics containing MSiO3:Eu2+ (M=Ca, Sr, Ba) phosphors for white LEDJournal of Luminescence, 2012
- Sunlight-activated long-persistent luminescence in the near-infrared from Cr3+-doped zinc gallogermanatesNature Materials, 2011
- Influence on luminescent properties of the Sr2MgSi2O7: Eu2+ by Dy3+, Nd3+ co-dopingJournal of Alloys and Compounds, 2009
- Enhanced luminescent properties of long-persistent Sr2MgSi2O7:Eu2+, Dy3+ phosphor prepared by the co-precipitation methodJournal of Luminescence, 2008
- Combustion synthesis of long-persistent luminescent MAl2O4: Eu2+, R3+ (M=Sr, Ba, Ca, R=Dy, Nd and La) nanoparticles and luminescence mechanism researchActa Materialia, 2007
- Luminescent properties of Ca2MgSi2O7 phosphor activated by Eu2+, Dy3+ and Nd3+Optical Materials, 2004
- Mn2+ activated green, yellow, and red long persistent phosphorsJournal of Luminescence, 2003
- Influence of co-doping different rare earth ions on the luminescence of CaAl2O4-based phosphorsJournal of the European Ceramic Society, 2003
- A New Long Phosphorescent Phosphor with High Brightness, SrAl2 O 4 : Eu2 + , Dy3 +Journal of the Electrochemical Society, 1996