Effects of Dy3+/ Eu2+ Molar Ration on SrAl2O4：Eu2+，Dy3+Long Persistence Phosphors by Microwave Plasma Synthesisd Method

Wen Zhou Sun; Yu Hong Chen; Liang Jiang; Fei Han

doi:10.4028/www.scientific.net/AMR.197-198.298

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 197-198Effects of Dy3+/ Eu2+ Molar Ration on...

Effects of Dy³⁺/ Eu²⁺ Molar Ration on SrAl₂O₄：Eu²⁺，Dy³⁺Long Persistence Phosphors by Microwave Plasma Synthesisd Method

Abstract:

SrAl₂O₄:Eu²⁺, Dy3⁺ long persistence phosphors are synthesized by microwave plasma method. The effects of molar ratio of Dy³⁺ and Eu²⁺ on the phase composition, the spectrum properties and long afterglow property of phosphors are investigated in the paper. The analysis results show that spectrum properties depressed clearly following the increase of Dy³⁺/ Eu²⁺. And the afterglow property of phosphors are improved by doping of the Dy³⁺, but suppressed by excessive doping. On the one hand, this is because that the number of electrons trapped by defect levels increased with the increase of Dy³⁺. But on the other hand, it’s difficult to occur electric transition if doping excessive Dy³⁺, so leads to performance depressed. Above-mentioned results, it’s confirm that the optimized Dy³⁺/Eu²⁺ molar ratio is 2:1 when SrAl₂O₄:Eu²⁺, Dy³⁺ phosphors synthesized by microwave plasma method.

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Periodical:

Advanced Materials Research (Volumes 197-198)

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298-301

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https://doi.org/10.4028/www.scientific.net/AMR.197-198.298

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Online since:

February 2011

Authors:

Wen Zhou Sun, Yu Hong Chen, Liang Jiang, Fei Han

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Activator, Aid-Activator, Long Persistence Phosphors, Microwave Plasma

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