黄绿色长余辉发光材料Ba_2B_2O_5:Ce^(3+),Dy^(3+)的发光特性及机理（英文）

Luminescence Property and Mechanism of Yellow-green Long Persistent Phosphor Ba_2B_2O_5:Ce^(3+),Dy^(3+)

采用高温固相法制备了Ba_2B_2O_5:Ce^(3+),Dy^(3+)荧光粉,研究了荧光粉的发光特性及发光机理。结果表明:Ba_2B_2O_5:Dy^(3+)没有表现出长余辉发光特征,当掺杂Ce^(3+)于Ba_2B_2O_5:Dy^(3+)后,荧光粉材料仍呈现为白色发光特征;但是Ba_2B_2O_5:Ce^(3+),Dy^(3+)表现出了明显的黄绿色长余辉发光特性,该发光主要由陷阱所释放导带电子与发光中心Dy^(3+)的直接复合而产生的。研究结果将对长余辉发光材料的发展具有很好的参考意义。

Ba2B2O5： Ce^（3＋）,Dy^（3＋） phosphor was synthesized via a high-temperature solid state method, and the luminescence properties and mechanism were investigated. The results show that there is no long persistent luminescence in Dy^（3＋） singe-doped Ba2B2O5. For Ce^（3＋）/Dy^（3＋） co-doped in Ba2B2O5, the yellow-green long persistent luminescence phenomenon appears although the phosphor still emits white light, which may originate from the direct recombination of the conduction electrons released from traps with the emission centers of Dy^（3＋）. The results obtained will be useful for the development of long afterglow materials.