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本文通过对铕和铽在Ｃａ５（ＰＯ４）３Ｃｌ基质中的发光特征的研究，发现铕和铽之间存在着电子转移现象，并对其反应机理进行了探讨。Ｅｕ３＋（４ｆ６）和Ｔｂ３＋（４ｆ８）通过电子转移使它们达到电子结构稳定的Ｅｕ２＋（４ｆ７）和Ｔｂ４＋（４ｆ７）。在同一基质中双掺铕和铽时，在２５４ｎｍ紫外光激发下，能同时观察到Ｅｕ２＋，Ｅｕ３＋和Ｔｂ３＋的发射，这一现象的发现为单基双掺希土三基色荧光粉的研制提供了理论依据。
In this paper, the luminescence characteristics of europium and terbium in Ca5 (PO4) 3Cl matrix have been studied. It is found that there exists electron transfer between europium and terbium, and the reaction mechanism is discussed. Eu3 + (4f6) and Tb3 + (4f8) reach their electron-stable Eu2 + (4f7) and Tb4 + (4f7) by electron transfer. When Eu and Tb were doubly doped in the same matrix, the emission of Eu2 +, Eu3 + and Tb3 + can be simultaneously observed under 254nm UV excitation. The discovery of this phenomenon is the development of single-base and double-doping rare-earth trichromatic phosphors Theoretical basis.