Abstract
The luminescence properties of Eu 2 + have been studied in aluminosilicate (Al 2 O 3 . 2SiO 2 ). In (Al 2 O 3 . 2SiO 2 ):Eu 2 + phosphor, two emission bands are observed. Since these two emission bands are quite different, itcan 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.
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