Author/Authors :
Bagga، نويسنده , , Ruchika and Achanta، نويسنده , , Venu Gopal and Goel، نويسنده , , Ashutosh and Ferreira، نويسنده , , José M.F. and Singh، نويسنده , , Narinder Pal and Singh، نويسنده , , Davinder Paul and Falconieri، نويسنده , , Mauro and Sharma، نويسنده , , Gopi، نويسنده ,
Abstract :
The radiative emission properties of the Dy3+ ions in oxyfluoride glasses and glass ceramics have been investigated for the generation of white light. The X-ray diffraction pattern of the glass ceramics reveals the presence of NaAlSiO4 nanocrystals along with secondary phase of NaY9Si6O26 in the glass matrix after a suitable thermal treatment of the pristine glasses. Intense white light emission has been observed when the samples are excited with 350 nm light. Yellow to blue emission intensity ratios and chromaticity color coordinates have been determined from the visible luminescence spectra. All color coordinates are found to lie in the white region of the chromaticity color diagram proposing the suitability of the present studied materials for color display devices.
Keywords :
Nano-crystalline glass-ceramic , Photoluminescence spectroscopy , Raman spectroscopy , oxyfluoride glass , Rare earth
