摘要
在水热条件下,以Ce（NO3）3,Tb（NO3）3和Na BF4为前驱体成功合成了Ce F3：Tb发光材料。X射线衍射（XRD）,扫描电镜（SEM）,透射电镜（TEM）以及高分辨投射电镜（HRTEM）表征结果表明：所制备的Ce F3：Tb发光材料结晶良好,具有单分散六方片状形貌,颗粒尺寸分布范围为380~420 nm,平均粒径400 nm。光致发光性能（PL）测试表明：其激发光谱是由峰值位于250 nm左右的激发带组成,属于Ce^3＋4f能级到5d激发态不同晶体场劈裂组分的f-d允许跃迁;发射光谱是由Tb^3＋的^5D4→^7FJ（J=6,5,4,3）特征发射组成,其中以543 nm的^5D4→^7F5发射为主,表明Ce^3＋能够有效敏化Tb^3＋。
CeF3： Tb phosphors were successfully prepared using Ce（NO3）3,Tb（NO3）3 and NaBF4 as precursors under hydrothermal condition. X-ray diffraction（ XRD）,scanning electron microscopy（ SEM）,transmission electron microscopy（ TEM） and high resolution transmission electron microscopy（ HRTEM） characterization indicated that the CeF3： Tb phosphors possessed high crystallinity and mono-dispersed hexagonal plates morphology,and its average grain size was about 400 nm arranging from 380 to 420 nm. The photo-luminescence（ PL） measurements showed the excitation spectrum of CeF3： Tb phosphors was dominated by a excitation band with a maximum at 250 nm,originating from the transition from 4f state to the crystal-field splitting components of 5d excitation state of Ce^3＋,the emission spectrum under the radiation of ultraviolet exhibited the characteristic^5D4→^7FJ（ J = 6,5,4,3） emission of Tb^3＋,indicating Ce^3＋ is an effective activator of Tb^3＋.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2015年第2期253-256,共4页
Journal of the Chinese Society of Rare Earths
关键词
氟化铈
水热
发光
CeF3
hydrothermal
luminescence
