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The Dy 3+  ions doped CaO-ZnO-B 2 O 3  glasses were synthesis by the melt quenching technique with various Dy 2 O 3  concentrations to investigation physical and optical properties. The results showed that the density and the molar volume trend to be increased along with increased Dy 3+  concentration. The absorption spectra showed characteristic absorption peaks in the visible and near infrared regions. Judd–Ofelt (JO) intensity parameters have been obtained from the optical absorption spectra. The emission spectra of the glasses are illustrated the highest emission intensity at 574 nm wavelength, which corresponding to Dy 3+  transition  4 F 9/2 → 6 H 13/2  level. The decay time value decreased as the concentration of Dy 2 O 3  increased. The CIE 1931 chromaticity investigation showed that Dy 3+  doped glasses emitted light with white color.

White Emission from Dy 3+ Doped in ZnO – CaO – B 2 O 3 for WLEDs Material Application