Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes

Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes A new bluish white-emitting phosphor based on a phosphate host matrix, CdBaP2O7:Eu2+, was prepared by a conventional solid-state reaction method. The photoluminescence properties were investigated in both ultraviolet (UV) and vacuum ultraviolet (VUV) regions. The band-gaps of Eu-doped CdBaP2O7 powders can be tuned in the ranges of 2.26–2eV. The Eu2+-doped CdBaP2O7 phosphor was efficiently excited at wavelengths of 250–400nm, which is suitable for the blue emission band for near-UV light-emitting-diode (LED) chips (360–400nm) and red emission peaks up to 700nm. CdBaP2O7:Eu2+ displays two different luminescence centers, which were suggested to Ba2+ and Cd2+ sites in the host. The dependence of luminescence intensity on temperatures was measured. The chromaticity coordinates and activation energy for thermal quenching were reported. The phosphor shows a good thermal stability on temperature quenching. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Luminescence Elsevier

Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier B.V.
ISSN
0022-2313
eISSN
1872-7883
D.O.I.
10.1016/j.jlumin.2016.03.003
Publisher site
See Article on Publisher Site

Abstract

A new bluish white-emitting phosphor based on a phosphate host matrix, CdBaP2O7:Eu2+, was prepared by a conventional solid-state reaction method. The photoluminescence properties were investigated in both ultraviolet (UV) and vacuum ultraviolet (VUV) regions. The band-gaps of Eu-doped CdBaP2O7 powders can be tuned in the ranges of 2.26–2eV. The Eu2+-doped CdBaP2O7 phosphor was efficiently excited at wavelengths of 250–400nm, which is suitable for the blue emission band for near-UV light-emitting-diode (LED) chips (360–400nm) and red emission peaks up to 700nm. CdBaP2O7:Eu2+ displays two different luminescence centers, which were suggested to Ba2+ and Cd2+ sites in the host. The dependence of luminescence intensity on temperatures was measured. The chromaticity coordinates and activation energy for thermal quenching were reported. The phosphor shows a good thermal stability on temperature quenching.

Journal

Journal of LuminescenceElsevier

Published: Aug 1, 2016

References

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