Fu Xiaopeng, Lü Wei, Jiao Mengmeng, You Hongpeng
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , Changchun 130022, P. R. China.
College of Chemical Engineering, Northeast Dianli University , Jilin 132012, P. R. China.
Inorg Chem. 2016 Jun 20;55(12):6107-13. doi: 10.1021/acs.inorgchem.6b00648. Epub 2016 Jun 1.
A series of Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphors with a broad emitting band have been synthesized by a traditional solid state reaction. The crystal structural and photoluminescence properties of Ba4Gd3Na3(PO4)6F2:Eu(2+) are investigated. The different crystallographic sites of Eu(2+) in Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphors have been verified by means of their photoluminescence (PL) properties and decay times. Energy transfer between Eu(2+) ions, analyzed by excitation, emission, and PL decay behavior, has been indicated to be a dipole-dipole mechanism. Moreover, the luminescence quantum yield as well as the thermal stability of the Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphor have been investigated systematically. The as-prepared Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphor can act as a promising candidate for n-UV convertible white LEDs.
通过传统固相反应合成了一系列具有宽发射带的Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉。研究了Ba4Gd3Na3(PO4)6F2:Eu(2+)的晶体结构和光致发光性能。通过其光致发光(PL)性能和衰减时间验证了Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉中Eu(2+)的不同晶体学位置。通过激发、发射和PL衰减行为分析表明，Eu(2+)离子之间的能量转移是一种偶极-偶极机制。此外，还系统地研究了Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉的发光量子产率和热稳定性。所制备的Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉有望成为近紫外光转换白光发光二极管的候选材料。
