Sr_2SiO_4∶Ce^(3+),Li^+蓝紫色荧光粉发光性能的研究（英文）  

Luminescence of Blue-purple Emitting Sr_2SiO_4∶ Ce^(3+),Li^+ Phosphor

作　　者：游静[1] 夏丽娜[1] 李湘祁[1,2] 谢秀珍[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108 [2]福州大学生态环境材料先进技术重点实验室,福建福州350108

出　　处：《发光学报》2016年第2期131-137,共7页Chinese Journal of Luminescence

摘　　要：以MCM-41为硅源,采用共沉淀法制备Sr_(2-x)SiO_4∶xCe3+(x=0.01~0.09,步长为0.01)和Sr_(1.95-y)SiO_4∶0.05Ce^(3+),y Li^+(y=0.01~0.07,步长为0.02)蓝紫色荧光粉。Sr_2SiO_4∶xCe^(3+)的发射光谱是一个不对称的宽带,最大峰值在410 nm左右。Ce^(3+)的最佳掺杂量为5%。Ce^(3+)离子倾向于占据九配位的Sr(Ⅱ)格位。共掺电荷补偿剂Li^+可以有效地提高Sr_(1.95)SiO_4∶0.05Ce^(3+)的发光强度,其中Li^+离子对1 100℃煅烧样品的发光强度的提高程度比1 000℃的更高,Li^+的最佳掺杂量为y=0.05。Blue-purple emitting Sr2-xSiO4 ： xCe3＋ （x = 0.01 - 0.09, in steps of 0.01 ） and Srl. 95 -y SiO4 ： 0.05Ce3＋ , yLi＋ （y = 0.01- 0.07, in steps of O. 02） phosphors have been prepared by co-precipitation method with MCM-41 as sil- ica source. The emission spectra of Sr2-xSiO4： xCe3＋ show an asymmetric broad band with a maximum around 410 nm and the critical mole fraction is found to be 5%. Ce3＋ ions prefer nine-coordinated Sr（l]） sites over ten-coordinated St（I） sites. The emission intensity of Srl.95 SiO4： 0.05Ce3 ＋ can be improved effectively by co-doping Li ＋ ions as charge compensator and a greater degree of the improvement is observed for phosphor calcined at 1 1100 ℃ compared with 1 000 ℃. The most suitable doping amount of Li ＋ for Srl95 _ySiO4： 0.05Ce3＋ ,yLi ＋ is y = 0.05.

关 键 词：荧光粉 Sr2SiO4∶Ce3+ Li+ 发光 

分 类 号：O482.31[理学—固体物理]