CeF_3向CeO_2的转变对掺杂Tb^(3+)离子发光性能的影响  

Effect of Transformation from CeF_3 to CeO_2 on Luminescent Properties of Doped Tb^(3+) Ions

作　　者：张丹[1] 李春阳[2] 常加忠[2] 张新磊[2] 崔琼琼[1] 王振领[2,3] 

机构地区：[1]周口师范学院化学系,河南省周口市文昌大道东段466001 [2]周口师范学院分析测试中心,河南省周口市文昌大道东段466001 [3]周口市应用化学与精细化工工程技术研究中心,河南省周口市文昌大道东段466001

出　　处：《光谱实验室》2012年第5期2647-2652,共6页Chinese Journal of Spectroscopy Laboratory

基　　金：国家自然科学基金(21171179);河南省高校科技创新人才支持计划(2011HASTIT030);河南省高校青年骨干教师资助计划(2009GGJS-119);国家人社部留学人员科技活动项目择优资助;河南省教育厅科研项目(2011B140025)

摘　　要：采用液相法合成CeF3:Tb3+并在不同温度下进行热处理,研究热处理温度对样品组成、相结构、形貌及发光性能的影响。结果表明:在300、400℃煅烧后得到的样品仍为CeF3:Tb3+,500℃煅烧后基质材料发生由六方相CeF3向立方相CeO2的转变,700℃时,完全转变为CeO2;紫外光激发下,掺杂Tb3+离子的发射光谱强度随煅烧温度升高而增加,400℃时达到最大,随后又逐渐降低,至700℃时则几乎不发光,这是由于CeF3向CeO2的转变切断了Ce3+、Tb3+离子间的有效能量传递所致。CeF3：Tb^3＋ was prepared by solution method,and then treated by heat treatment at different temperatures. The effects of temperature of heat treatment on the composition, phase structure, morphology and luminescent properties of samples were investigated. The results indicated that the calcined compounds at 300℃ and 400℃ kept CeF3.Tb^3＋, and the transformation of host materials from hexagonal CeF3 to cubic CeO2 occurred at 500℃ ,and CeO2 was completely translated at 700℃. Under the excitation of ialtraviolet light,the emission intensity of Tb^3＋ ions increased with the increasing of calcination temperature,and attained the maximum at 400℃,then decreased,and finally Tb^3＋ ions exhibited no emission at 700℃. The reason is that the transformation from CeF3 to CeO2 cuts off the efficient energy transfer between Ce^3＋ and Tb^3＋ ions.

关 键 词：三氟化铈 二氧化铈 发光 能量传递 铽(Ⅲ)离子 

分 类 号：O482.31[理学—固体物理] O657.61[理学—物理]