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A study on the luminescence characterization of red long persistent phosphors by the $B_2O_3$ addition  

Hwang, Ku-Hyeon (Department of Gemological Engineering, Dongshin University)
Choi, Jong-Koen (Department of Gemological Engineering, Dongshin University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.18, no.1, 2008 , pp. 22-26 More about this Journal
Abstract
Red long persistent phosphors of $CaZrO_3$ : Pr was synthesized by a solid reaction method. $CaCO_3\;and\;ZrO_2$ were used as hosting materials and Pr was doped as luminescence center element, and $B_2O_3$ was used as flux. The XRD pattern confirmed crystalline phase of the phosphor, and photoluminescence investigation showed emission spectrum at $480{\sim}570nm\;and\;590{\sim}700nm$. Phosphor samples were synthesized with $B_2O_3$ flux concentration of 1, 5, 10%, and luminescent peak of maximum intensity at 494 nm was obtained for 1% $B_2O_3$. Luminescent peak of red color at 620 nm was of highest intensity for 10% $B_2O_3$.
Keywords
$CaZrO_3$; Red long persistent phosphor; $Pr^{3+}$; $B_2O_3$;
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