Bright white light emission from (Gd3+ /Dy3+) dual doped transparent lithium aluminum borate glasses for W- LED application

W. Rittisut, N. Wantana, Y. Ruangtaweep, P. Mool-am-kha, J. Padchasri, S. Rujirawat, P. Manyum, R. Yimnirun, P. Kidkhunthod, A. Prasatkhetragarn, S. Kothan, H. J. Kim, J. Kaewkhao

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17 Scopus citations

Abstract

The improving optical and luminescence properties of Dy3+ and Gd3+ dual doped lithium aluminum borate glasses with composition 25Li2O-5.0Al2O3-2.5Gd2O3-(67.5-X)B2O3-XDy2O3 glasses were successfully developed. The as-synthesis composite used conventional melt-quenching processes. All glass samples doped with Dy2O3 show an enhanced emission intensity (photo and radioluminescence spectra) with increasing the concentration of Dy2O3 up to 1.0 mol%, and beyond that, concentration quenching has occurred for all samples. The experimental decay times calculated from the decay profiles have been gradually declined with an increase in Dy3+ ion concentration. The chromaticity coordinates (CIE 1931) were located in the white light region of the color chromaticity diagram. The Dy-doping glasses synthesized show the prevalent presence of Dy3+also, the presence of the trivalent oxidation state in the glasses series. Therefore, the results confirm that the Dy3+-doped glasses could be useable for white-LEDs applications.

Original languageEnglish
Article number111705
JournalOptical Materials
Volume122
DOIs
StatePublished - Dec 2021

Keywords

  • Borate glass
  • Luminescence
  • White-LEDs

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