中文摘要：

采用高温固相法制备了Ca10Li(PO4)7:Dy3+发光材料,研究了Dy3+在Ca10Li(PO4)7基质中的发光特性。XRD测量结果表明,烧结温度为1050益时所制备的样品为纯相Ca10Li(PO4)7晶体。从激发谱可以看出样品主激发峰位于349nm(6H15/2→6P7/2),363nm(6H15/2→6P5/2),385nm(6H15/2→6M21/2),样品可被UV-LED管芯有效激发。发射谱由位于481nm(蓝)和572nm(黄)的两个峰组成,对应的能级跃迁为4F9/2→6H15/2、6H13/2。研究了不同Dy3+掺杂浓度对发光强度的影响,当Dy3+的摩尔分数为10%时发光最强。掺入Ce3+作为敏化剂,Ce3+→Dy3+发生共振能量传递,当掺杂量为10%Dy3+、14%Ce3+时,样品发光最强,其强度为单掺10%Dy3+时的13.4倍,发光颜色由黄白变为蓝白。

英文摘要：

A novel Ca10Li( PO4)7∶ Dy3+phosphor was prepared by solid state reaction method,and its luminescence properties were studied. XRD results showed that 1 050 ℃ was a suitable sintered temperature for preparation of Ca10Li( PO4)7∶ Dy3 +phosphors. The main excitation peaks were located at 349 nm(6H15 /2→6P7 /2),363 nm(6H15 /2→6P5 /2) and 385 nm(6H15 /2→6M21 /2). The sample can be excited by UV-LED. The emission spectra composed two peaks,which were located at481 nm( blue) and 572 nm( yellow),corresponding to the4F9 /2→6H15 /2、6H13 /2typical transition of Dy3+. The influence of doped Dy3+concentration on the luminescent intensity of Ca10Li( PO4)7∶Dy3 +was investigated. The relative intensity of Ca10Li( PO4)7∶ Dy3+sample reached the maximum value when Dy3+mole fraction was 10%. The intensities increased with Ce3+mole fraction. The relative intensity of the sample reached the maximum value when Dy3+mole fraction was 10%,Ce3+mole fraction was 14%. The intensity is 13. 4 times higher than the original. The color of the phosphor was changed from yellow-white to blue-white.