Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes. - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Journal of Luminescence Année : 2016

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

Résumé

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 2.26–2 eV. The Eu2+-doped CdBaP2O7 phosphor was efficiently excited at wavelengths of 250–400 nm, which is suitable for the blue emission band for near-UV light-emitting-diode (LED) chips (360–400 nm) and red emission peaks up to 700 nm. 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.

Domaines

Chimie
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Dates et versions

hal-01369207 , version 1 (20-09-2016)

Identifiants

Citer

Mouna Derbel, Aïcha Mbarek, Geneviève Chadeyron, Mohieddine Fourati, Daniel Zambon, et al.. Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes. . Journal of Luminescence, 2016, 176, pp.356-362. ⟨10.1016/j.jlumin.2016.03.003⟩. ⟨hal-01369207⟩
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