Luminescence Properties of Eu[sup 2+]-Activated (Al[sub 2]O[sub 3]⋅2SiO[sub 2]) Phosphor by Photoluminescence Spectra

The luminescence properties of Eu 2 + have been studied in aluminosilicate ( Al 2 O 3 ⋅ 2 SiO 2 ) . In ( Al 2 O 3 ⋅ 2 SiO 2 ) : Eu 2 + phosphor, two emission bands are observed. Since these two emission bands are quite different, it can be presumed that Eu 2 + ions occupy two types of sites, namely, Eu 1 and Eu 2 . The energy transfer between the Eu 2 + ions is elucidated from the critical concentration quenching data based on the electric multipolar interaction of the Eu 1 and Eu 2 site, respectively. In addition, the dominant multipolar interaction character of the Eu 2 site emission center was investigated from the relationship between the emission intensity per activator concentration and the activator concentration.