红色荧光粉YAlO_3:Eu^(3+)Cu^+的制备和发光特性  

Synthesis and Luminescent Properties of YAlO_3:Eu^(3+)Cu^+ Red Phosphors

作　　者：刘慧娟[1] 孙洪巍[1] 赵冉[1] 胡行[1] 胡少杰[1] 

机构地区：[1]郑州大学物理工程学院材料物理教育部重点实验室,河南郑州450001

出　　处：《郑州大学学报（理学版）》2012年第1期83-87,共5页Journal of Zhengzhou University:Natural Science Edition

摘　　要：研究了化学沉淀法制备YAP:Eu3+Cu+荧光粉,得到适宜工艺参数.用XRD和PL谱分别表征前驱体的晶体结构和荧光粉的荧光特性.前驱体的焙烧温度为1 200℃,焙烧时间为2 h;Eu3+的适宜掺杂浓度为3%,而且在398 nm紫外光激发下荧光粉呈现红色光谱,这是由于Eu3+的4fn电子组态内5D0→7FJ(J=0～4)的跃迁发射,由5D0→7F2的发射特性和发射强度表明Eu3+主要处于非反演对称中心.Cu+增强了YAP:Eu3+的发光强度是因为Cu+→Eu3+之间的能量传递,Cu+对Eu3+有敏化作用.YAP：Eu3＋Cu＋ red phosphors were synthesized by coprecipitant.X-ray diffraction and photoluminescence were employed to characterize their structural and luminescence properties.It was found the appropriate sintering temperature and sintering time were 1 200 ℃ and 2 h respectively.The appropriate concentration of doped Eu3＋ was 3%.Under ultraviolet excitation with the wavelength of 398 nm,these samples showed red luminescence which were probably attributed to transition from 5D0 excited state to 7FJ（J=0~4） ground states.The transition from 5D0→7F2 indicated that Eu3＋ preferred to occupy a low symmetry site.The incorporation of Cu＋ ions greatly enhanced the luminescence intensity probably due to the Cu＋→Eu3＋ energy transfer.

关 键 词：YAP 共沉淀法 发光 

分 类 号：O433.4[机械工程—光学工程] O433.2[理学—光学]