State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry,Chinese Academy of Sciences, Changchun 130022, China.
Opt Lett. 2009 Dec 15;34(24):3833-5. doi: 10.1364/OL.34.003833.
Nanocrystalline LaOCl:Tb(3+)/Sm(3+) phosphors were synthesized by a Pechini-type sol-gel process. Under UV and electron-beam excitation, LaOCl:Tb(3+)/Sm(3+) show the characteristic emission of Tb(3+) ((5)D(3,4)-->(7)F(6),...2) and Sm(3+) ((4)G(5/2)-->(6)H(5/2,7/2,9/2)), respectively. In particular, the cathodoluminescence (CL) color of LaOCl:Tb(3+) can be tuned from blue to green by changing Tb(3+)-doped concentration, and their CL intensities (brightness) are higher than those of commercial products Y(2)SiO(5):Ce(3+) and ZnO:Zn, respectively. White CL can be realized by codoping with Tb(3+) and Sm(3+) in a single-phase LaOCl host. The obtained white light is very close to the standard white light. These phosphors are promising for application in field-emission displays.
采用柠檬酸络合溶胶-凝胶法制备了纳米晶 LaOCl:Tb(3+)、Sm(3+)荧光粉。在紫外光和电子束激发下，LaOCl:Tb(3+)、Sm(3+)分别发出 Tb(3+)的特征发射（(5)D(3,4)-->(7)F(6),...2）和 Sm(3+)的特征发射（(4)G(5/2)-->(6)H(5/2,7/2,9/2)）。特别是，通过改变 Tb(3+)掺杂浓度，可以将 LaOCl:Tb(3+)的阴极射线发光（CL）颜色从蓝色调谐到绿色，其 CL 强度（亮度）分别高于商用产品 Y(2)SiO(5):Ce(3+)和 ZnO:Zn。在单相 LaOCl 基质中同时掺杂 Tb(3+)和 Sm(3+)可以实现白色 CL。所获得的白光非常接近标准白光。这些荧光粉有望应用于场发射显示器。
