Eu~(2＋)を添加したアルカリ土類金属ケイ酸塩の長残光特性とそのメカニズム

摘要

UV excitation for Ba_3SiO_5:Eu~ (2+) produces long-lasting phosphorescence from Eu~(2+) ions besides the intrinsic Eu~(2+) luminescence. The distribution of the radiative decay rates is due to the recombination of distant pairs of trapped electrons and holes in the crystal. The decay rate is large as temperature elevates. We propose a long-lasting phosphorescence mechanism that electrons and holes which are trapped by lattice defects cause recombination by thermal energy.