State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Opt Lett. 2009 Oct 1;34(19):2882-4. doi: 10.1364/OL.34.002882.
Rare earth (RE) ion doped glass ceramics containing hexagonal CeF(3) nanocrystals with a mean size of 12 nm were fabricated. Using Eu(3+) as the structural probe, Stark splitting emissions and the low forced electric dipole D5(0)-->F7(2) transition of Eu(3+) revealed the partition of RE ions into low-phonon-energy CeF(3) nanocrystals. Efficient energy transfers from Ce(3+) to Tb(3+) or Dy(3+) were found, and the energy transfer efficiency was evaluated. Under ultraviolet excitation, intense white-light emission was observed in Dy(3+)-doped samples owing to Dy(3+) resided in CeF(3) crystalline environment, indicating their potential application in white-light-emitting diodes.
制备了含有平均尺寸为 12nm 的六方 CeF(3)纳米晶的稀土（RE）离子掺杂微晶玻璃。以 Eu(3+)作为结构探针，揭示了 RE 离子进入低声子能 CeF(3)纳米晶的情况，观察到了 Eu(3+)的斯塔克分裂发射和低强迫电偶极子 D5(0)-->F7(2)跃迁。发现了从 Ce(3+)到 Tb(3+)或 Dy(3+)的有效能量转移，并对能量转移效率进行了评估。在紫外光激发下，由于 Dy(3+)处于 CeF(3)晶态环境中，Dy(3+)掺杂样品表现出强烈的白光发射，表明其在白光发光二极管中有潜在的应用。
