State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China.
Dalton Trans. 2012 Jul 28;41(28):8660-8. doi: 10.1039/c2dt30325f. Epub 2012 Jun 7.
YF(3):Ln(3+) (Ln = Ce, Tb, Pr) microspindles were successfully fabricated by a facile hydrothermal method. X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), lifetimes, photoluminescence (PL) and low-voltage cathodoluminescence (CL) were used to characterize the resulting samples. The lengths and diameters of YF(3):0.02Ce(3+) microspindles are around 760 nm and 230 nm, respectively. Adding dilute acid and trisodium citrate (Cit(3-)) are essential for obtaining YF(3) microspindles. A potential formation mechanism for YF(3) microspindles has been presented. PL spectroscopy investigations show that YF(3):Ce(3+) and YF(3):Tb(3+) microcrystals exhibit the characteristic emission of Ce(3+) 5d → 4f and Tb(3+ 5)D(4)→(7)F(J) (J = 6-3) transitions, respectively. In addition, the energy transfer from Ce(3+) to Tb(3+) was investigated in detail for YF(3):Ce(3+), Tb(3+) microspindles. Under the excitation of electron beams, YF(3):Pr(3+) show quantum cutting emission and YF(3):Ce(3+), Tb(3+) phosphors exhibit more intense green emission than the commercial phosphor ZnO:Zn.
YF(3)：Ln(3+)（Ln = Ce、Tb、Pr）微纺锤体通过一种简单的水热法成功制备。X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、寿命、光致发光（PL）和低电压阴极发光（CL）用于对所得样品进行表征。YF(3)：0.02Ce(3+)微纺锤体的长度和直径分别约为 760nm 和 230nm。添加稀酸和柠檬酸三钠（Cit(3-)）对于获得 YF(3)微纺锤体是必不可少的。提出了 YF(3)微纺锤体的潜在形成机制。PL 光谱研究表明，YF(3)：Ce(3+)和 YF(3)：Tb(3+)微晶体分别呈现出 Ce(3+)5d→4f 和 Tb(3+)5D(4)→(7)F(J)（J=6-3）跃迁的特征发射。此外，详细研究了 YF(3)：Ce(3+)，Tb(3+)微纺锤体中 Ce(3+)到 Tb(3+)的能量转移。在电子束的激发下，YF(3)：Pr(3+)显示量子切割发射，YF(3)：Ce(3+)，Tb(3+)荧光粉比商用荧光粉 ZnO：Zn 表现出更强的绿色发射。
