Photoluminescence and white light generation behavior of lithium gadolinium silicoborate glasses

• Published in: Journal of alloys and compounds Vol. 695; pp. 2347 - 2355
• Main Authors: Shamshad, L., Rooh, G., Kirdsiri, K., Srisittipokakun, N., Damdee, B., Kim, H.J., Kaewkhao, J.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 25-02-2017; Elsevier BV
• Subjects: Borate glasses; Chemical compounds; Chromaticity; CIE chromaticity; Decay rate; Dipoles; Emission analysis; Emission spectra; Energy transfer; Feasibility studies; Gadolinium; Glass; Interrupted quenching; Lasing; Light levels; Lithium; Luminescence; Luminous intensity; Optical properties; Photoluminescence; Quenching; Silica glass; Silicon dioxide; Studies; White light; Borate glasses; CIE chromaticity; Emission spectra; Luminescence
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2016.11.105

The Dy3+-doped lithium gadolinium silica borate glasses with composition (in mol%) 40Li2O:15Gd2O3:5SiO2: (40-x)B2O3:xDy2O3, x = 0.01, 0.1, 0.5, 1.0, 2.0 were prepared by melt quenching technique and characterized through absorption and emission spectra, CIE chromaticity coordinates and decay rate analysis. Judd-Oflet parameters have been calculated for lithium gadolinium silico borate glass and used for the derivation of radiative properties for excited luminescent levels of Dy3+ ions. The feasibility of white light generation have been evaluated by the yellow-to-blue emission intensity ratios and CIE chromaticity coordinates as a function of Dy3+ concentration. The non-exponential decay rates are well-fitted to Inokuti-Hirayama model for S = 6. The perceived non-exponential decay nature and life time quenching have been ascribed to the energy transfer between excited and unexcited Dy3+ ions through dipole–dipole interaction. The CCT values for the present studied glasses obtained in the 4584-4235 K at λexc = 387 nm. These CCT values are below the warm CCT (i.e CCT 4000 K). The reasonably good luminescence properties of LGSiBDy10 glass indicates the potentiality of the title of glass to be applied as lasing medium for white light generation.
•Spectroscopic properties of Dy3+ ion in Li2OGd2O3SiO2B2O3 were studied.•JO analysis were used to analyze spectroscopic properties.•White emission was observed from glass sample.•Lasing properties were characterized.