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萤石掺杂Eu在还原气氛下灼烧可制备出发蓝色荧光的萤石 :Eu2 +晶体 ,该体系的发光为5d→ 4f跃迁发射。在萤石 :Eu2 +体系中对称程度较高的 [0 11]方向发现Eu或F点缺陷 ,但其对发光体整体发光影响不大 ;对发光有重要作用的是对称性较低的 [ l12 ]、[0 13]方向的Eu2 +及F晶簇。Eu2 +晶簇与基体界面会产生定域能级
Fluorite-doped Eu is burned in a reducing atmosphere to produce a blue-emitting fluorite: Eu2 + crystal, and the luminescence of the system is emitted from a 5d → 4f transition. In the fluorite: Eu2 + system, the symmetry of the [0 11] direction found Eu or F point defects, but it has little effect on the overall luminescence of luminophores; the luminescence has an important role in the lower symmetry [l12 ], Eu2 + and F crystal clusters in [0 13] direction. Eu2 + cluster and matrix interface will produce a localized level