An efficient co-doping of Eu and Er in CaAl2O4 aluminate phosphor

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 2008 English Publisher:Elsevier BVJournal:Physica B: Condensed Matter, volume 403, pages 3,195-3,198 (issn: 0921-4526,

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Authors: Hojin Ryu; K.S. Bartwal;

doi: 10.1016/j.physb.2008.04.003

An efficient co-doping of Eu and Er in CaAl2O4 aluminate phosphor

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Abstract

Abstract CaAl2O4:Eu2+ co-doped with varying concentrations of Er3+ was prepared by solid-state reaction method. Prepared materials with 1 mol% Eu2+ and 2–10 mol% of Er3+ were investigated for their photoluminescence properties. Phase, morphology and crystalline structure were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Broad band UV-excited luminescence was observed for CaAl2O4:Eu2+, Er3+ in the blue region (λmax=440 nm) due to transitions from 4f65d1 to the 4f7 configuration of the Eu2+ ion. The Er3+ ion co-doping generates deep traps, which results in longer decay time for phosphorescence.

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Korea Research Institute of Chemical Technology
Korea (Republic of)

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