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Abstract
The aim of the present work is to study the optical and luminescence properties of Dy2O3 doped Na2O-MgO-Bi2O3-SiO2 glasses. The Dy3+ ion is chosen as dopant because it emits three visible bands, blue (470–485 nm; 4F9/2→6H15/2), yellow (570–580 nm; 4F9/2→6H13/2) and red (640–655 nm; 4F9/2→6H11/2) luminescence and finds its applications in the fields of laser, white LEDs, telecommunication technology and display devices. NaMgBiSiDy glasses with the compositions of (30-x)SiO2: 10Bi2O3: 30Na2O: 30MgO: xDy2O3 where x=0.0, 0.1, 0.5, 1.0, 1.5 and 2.0 mol% were prepared by melt-quenching technique and characterized by using density, optical absorption photoluminescence (PL) and decay rate measurements as function of different concentrations. The chromaticity coordinates were calculated from emission spectra and analyzed with CIE color diagram and appear in the white light region under ultraviolet excitation.
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