Europium(Eu^(3+))doped glasses of chemical compositions(55-x)B2O3:10 SiO2:25 Y2O3:10CaO:xEu_(2)O_(3),where x denotes mol%and ranges 0≤x≤2.5,were synthesized by adopting conventional melt quenching technique,Physical...Europium(Eu^(3+))doped glasses of chemical compositions(55-x)B2O3:10 SiO2:25 Y2O3:10CaO:xEu_(2)O_(3),where x denotes mol%and ranges 0≤x≤2.5,were synthesized by adopting conventional melt quenching technique,Physical properties like density,molar volume,polaron radius,inter-ionic distance and field strength of the glass samples were investigated to assess the impact of Eu_(2)O_(3).Optical and luminescence properties of the glasses were characterized with optical absorption,photoluminescence,X-ray induced emission spectra,temperature dependence emission spectra and decay times.Judd-Ofelt(JO)intensity parameters(Ωλ)of the glasses were evaluated based on the absorption spectrum of 0.5 mol%.JO parameters,calculated from absorption spectra with thermal corrections on oscillator strength,were used to evaluate radiative properties such as radiative transition probability(AR),branching ratio(β_(R)),stimulated cross section emission(σ)and radiative lifetime(τ_(R))for 5D0→7 FJ(J=0,1,2,3 and 4)transitions.The decay rate of^(5)D0 fluorescent level for all the glass samples was single exponential.Lifetimes of the^(5)D0 level were decreased with increasing concentrations of Eu^(3+)ions from 0.05 mol%to 2.5 mol%which might be due to energy transfer through cross-relaxation in the glasses.The chromaticity coordinates(x,y)were similar for all BSYCaEu glasses and were located at the red region of CIE 1931 color chromaticity diagram.Hence,these results confirm that the Eu^(3+)doped BSYCaEu glasses could be useful for visible red lasers and glass scintillation applications.展开更多
基金Project supported by the Ministry of Science and Technology(MEST),Korea(2015R1A2A1A13001843)Kyungpook National University Research Fund,2016,National Research Council of Thailand(NRCT)Nakhon Pathom Rajabhat University(NPRU)(GB_60_25)
文摘Europium(Eu^(3+))doped glasses of chemical compositions(55-x)B2O3:10 SiO2:25 Y2O3:10CaO:xEu_(2)O_(3),where x denotes mol%and ranges 0≤x≤2.5,were synthesized by adopting conventional melt quenching technique,Physical properties like density,molar volume,polaron radius,inter-ionic distance and field strength of the glass samples were investigated to assess the impact of Eu_(2)O_(3).Optical and luminescence properties of the glasses were characterized with optical absorption,photoluminescence,X-ray induced emission spectra,temperature dependence emission spectra and decay times.Judd-Ofelt(JO)intensity parameters(Ωλ)of the glasses were evaluated based on the absorption spectrum of 0.5 mol%.JO parameters,calculated from absorption spectra with thermal corrections on oscillator strength,were used to evaluate radiative properties such as radiative transition probability(AR),branching ratio(β_(R)),stimulated cross section emission(σ)and radiative lifetime(τ_(R))for 5D0→7 FJ(J=0,1,2,3 and 4)transitions.The decay rate of^(5)D0 fluorescent level for all the glass samples was single exponential.Lifetimes of the^(5)D0 level were decreased with increasing concentrations of Eu^(3+)ions from 0.05 mol%to 2.5 mol%which might be due to energy transfer through cross-relaxation in the glasses.The chromaticity coordinates(x,y)were similar for all BSYCaEu glasses and were located at the red region of CIE 1931 color chromaticity diagram.Hence,these results confirm that the Eu^(3+)doped BSYCaEu glasses could be useful for visible red lasers and glass scintillation applications.
