橙红色荧光粉Ca_3Y_2(Si_3O_9)_2∶Sm^(3+)的制备及发光性能的表征  

Preparation and Luminescence Properties of Reddish-orange Phosphors Ca_3Y_2(Si_3O_9)_2∶Sm^(3+)

作　　者：杨志平[1] 梁晓双 赵引红[1] 侯春彩[1] 王灿[1] 董宏岩[1] 刘利鹏[2] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《光子学报》2014年第3期53-57,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.51202053);河北省自然科学基金(No.Q2012061)资助

摘　　要：采用高温固相法合成了Ca3Y2-2x(Si3O9)2∶2xSm3+系列荧光粉,并表征了材料的发光特性.X射线衍射图谱表明:得到的样品为纯相Ca3Y2(Si3O9)2晶体;样品的激发光谱主要来源于Sm3+的特征激发;分别采用紫外、近紫外和蓝光作为激发源,样品均发射橙红光.在402nm近紫外光激发下,Ca3Y2(Si3O9)2∶Sm3+发射光谱主要由3个峰组成,发射峰值分别位于565nm、604nm和651nm,归属于Sm3+的4G5/2→6HJ/2(J=5,7,9)跃迁,其中发射主峰位于604nm处.通过时间分辨光谱测得Sm3+的4G5/2能级的荧光寿命.随着Sm3+摩尔浓度的增加,样品发光强度先增强后减弱,当x=0.02时发光强度达到最大,浓度猝灭机理为电偶极-电偶极相互作用.A series of orange-red phosphors Ca3Y2-2x（Si3O9）2：2xSm^3＋ were synthesized by conventional solid-state reaction, and their photoluminescence properties were investigated. The X-ray diffraction （XRD） pattern shows that Ca3Y2（Si3O9）2：Sm^3＋ crystals are the pure phase. The excitation spectra contain the characteristic excitation of Sm^3＋. The emission spectra of Ca3Y2（Si3O9）2：Sm^3＋ phosphors exhibit three main peaks assigned to the 4G5/2→6HJ/2（J=5,7,9） transitions of Sm^3＋ under 402 nm excited radiation, the dominating emission peaks at 565 nm, 604 nm, 651 nm. The decay time of 4G5/2 level in Sm^3＋ was measured by the time resolved spectrum. The luminescence intensity firstly increases with increasing of Sm^3＋ concentration, and then decreases, the emission reaches the maximum intensity at x=0.02, and the concentration quenching mechanism is the electric dipole-electric dipole interaction.

关 键 词：橙红色 荧光粉 发光 SM^3+ 浓度猝灭机理 

分 类 号：O482.31[理学—固体物理]