EUROPIUM AND DYSPROSIUM IONS CO-DOPED WHITE LIGHT LUMINESCENCE MAGNESIUM SULFOBORATE GLASSES FOR WHITE LEDS

Abstract

To develop a new luminescence property of europium and dysprosium ions co-doped
Magnesium sulfoborate glasses, and to apply it for white LEDs. Europium and dysprosium codoped
Magnesium sulfoborate glasses are prepared by conventional melt quench technique and
their excitation and luminescence characteristic were studied. The samples were characterized
using X-Ray Diffraction (XRD) and emission spectra by exciting the glass at 350 nm. XRD
confirms the amorphous nature of the prepared samples. A combination of blue, green, yellow
and red emission bands was shown for these glasses, and white light emission could be
observed under UV light excitation. These results indicate that Europium and dysprosium codoped
magnesium sulfoborate glasses could be a potential candidate for white LEDs with
excitation of a 360 nm near UV LED chip.