单基双掺稀土三基色荧光体系的发光特性

Novel Trichromatic Phosphor Codoped with Two Rare Earth Ions in One Matrix

利用Eu3+ 和Tb3+ 一对三价稀土离子之间电子组态具有共轭性的特征 ,双掺到同一基质中 ,由于电子转移 ,部分Eu3+ 转换成Eu2 + ,使发红光的Eu3+ 、发绿光的Tb3+ 和发蓝光的Eu2 + 共存于同一体系。在空气气氛中合成了单基双掺稀土三基色荧光粉CaBPO5 ∶Eu ,Tb。研究了2 5 4和 3 65nm激发下荧光体的发射特性。在双掺体系中引入Ce3+ ,由于Ce3+ 的敏化作用增强了Eu2 + ,Tb3+ 的发光强度。讨论了Ce3+ 的敏化机制。

The luminescence properties of CaBPO 5∶Eu, Tb phosphor and the sensitization of Ce 3+ were investigated. The CaBPO 5∶Eu, Tb phosphors were synthesized in air and the emission spectra of Eu 3+ , Tb 3+ and Eu 2+ were observed in the phosphor. The result can be considered that there is electron transfer among conjugate rare earth ions. Sensitization of Ce 3+ improves the intensity of emission of Tb 3+ and Eu 2+ . We predict a novel trichromatic lamp phosphor codoped with Eu 3+ Tb 3+ in matrix CaBPO 5.