Characterization of Phosphors in the Eu-doped Sr-Al-B-O system

Jun-ichi MIYOSHI; Kenji TODA; Kazuyoshi UEMATSU; Mineo SATO; Yoshihiro NISHISU; Mikio KOBAYASHI

doi:10.11190/jer.9.137

Original Article

Characterization of Phosphors in the Eu-doped Sr-Al-B-O system

Jun-ichi MIYOSHI, Kenji TODA, Kazuyoshi UEMATSU, Mineo SATO, Yoshihiro NISHISU, Mikio KOBAYASHI

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Keywords: aluminoborate, europium, afterglow, photoluminescence

JOURNAL FREE ACCESS

2003 Volume 9 Issue 2 Pages 137-142

DOI https://doi.org/10.11190/jer.9.137

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Abstract

Phosphor materials have been searched in the Sr-Al-B-O system. For a molar ratio (Sr_1-xEu_x) : Al : B = 1 : 2 : 2 (x = 0.01), a crystalline layered compound SrAl₂B₂O₇：Eu²⁺ was synthesized at 900 °C for 12 h in a reductive atmosphere. The SrAl₂B₂O₇:Eu²⁺ showed blue emission under UV (254 nm) and VUV (Vacuum Ultraviolet, 146 nm) excitation. For the ratio (Sr_1-xEu_x) : Al : B = 2 : 2 : 2 (x = 0.01), a transparent glass and SrAl₂O₄ component with a long afterglow phosphorescence was found.

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