中文摘要：

采用沉淀法制备了不同Sm^3＋掺杂浓度的白钨矿结构CaWO4荧光粉材料.对CaWO4：Sm^3＋材料的光致发光性质的研究结果表明，在404 nm光照下样品可以实现色纯度较高的红光发射，而短波紫外240 nm光照下除Sm^3＋的特征发射外还能观察到CaWO4自激发发射，能够获得较强的白光；实验发现Sm^3＋掺杂浓度为2%时样品的发光强度最高；通过对实验数据的分析确定了Sm^3＋之间的能量传递类型为电偶极-电偶极相互作用，并计算了能量传递的临界距离大约为2.0 nm.

英文摘要：

The scheelite-structured CaWO4 phosphors doped with different concentrations of Sm^3＋were prepared by precipitation method. Photoluminescence properties of Sm^3＋-doped CaWO4 samples were studied. Results indicate that red light emission of Sm^3＋ with higher color purity in the samples can be excited by 404 nm blue light. There are 4f-4f intrinsic emission of Sm^3＋ and a strong self-excitation emission of CaWO4 when excited by 240 nm short-wave ultraviolet, and the white light emission can be obtained. Experiments show that the best Sm^3＋doping concentration is 2%. The energy transfer type between Sm^3＋ions was determined to be the electric dipole-electric dipole interaction and the critical energy transfer distance （Dc） was calculated to be 2.0 nm.