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新型红色长余辉发光材料Gd2O2S:EU3+,Si4+,Ti4+的合成及性能表征
引用本文:王飞,刘利军,王其洪,于凯立,邵泽. 新型红色长余辉发光材料Gd2O2S:EU3+,Si4+,Ti4+的合成及性能表征[J]. 中山大学学报(自然科学版), 2009, 48(Z2)
作者姓名:王飞  刘利军  王其洪  于凯立  邵泽
作者单位:昆明理工大学材料与冶金工程学院,云南,昆明,650093
摘    要:采用高温固相反应法首次合成了新型红色长余辉发光材料Gd2O2S:Eu3+,Si4+,Ti4+.用X射线粉末衍射(XRD)、扫描电镜(SEM)、分光光度计等对合成产物进行了分析与表征.结果表明:Gd2O2S:Eu3+,Si4+,Ti4+的晶体结构与Gd2O2S相同,为六方晶系.颗粒的形貌为类球形.Gd2O2S:Eu3+,Si4+,Ti4+的激发光谱呈250~400 nm宽带状,激发光谱主峰位于365 nm;发射光谱为线状光谱,归属于Eu3+的5DJ(J=0,1)→7FJ(K=0,1,2,4)跃迁.最强的发射峰为627 nm和617 nm,均属于5D0→7F2跃迁,且627 nm的发射峰明显远强于617nm,显示出纯正的红色发光;并且Si4+和Ti4+离子的共掺杂可显著延长样品Cd2O2S:Eu3+的余辉时间.

关 键 词:红色长余辉  激发光谱  发射光谱  发光材料

Synthesis and Characterization of the Red Long Afterglow Phosphor Gd2 O2 S:Eu3+, Si4+,Ti4+
WANG Fei,LIU Lijun,WANG Qihong,YU Kaili,SHAO Ze. Synthesis and Characterization of the Red Long Afterglow Phosphor Gd2 O2 S:Eu3+, Si4+,Ti4+[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2009, 48(Z2)
Authors:WANG Fei  LIU Lijun  WANG Qihong  YU Kaili  SHAO Ze
Abstract:Gd2O2S:Eu3+,Si4+ ,Ti4+ , as a novel red long afterglow phosphor, was first synthesized by high-temperature solid-state reac-tion method. The synthesized phosphors were investigated respectively by XRD, SEM and fluorescence speetrophotometer. The results showed that: Gd2 O2 S: Eu;3+, Si4+ , Ti4+ possess hexagonal crystal structure, which is similar to that of Gd202 S matrix. The particles of Gd2O2S: Eu3+, Si4+, Ti4+are basically spherical in shape,with good dispersion. The excitation spectrum is a broad band, from 250 nm to 400 nm, and the main peak is at 365 nm. The emission spectrum shows that Gd2O2S:Eu3+, Si4+, Ti4+has narrow emissionpeaks which belong to Eu3+ ions transition from 5DJ(J=0,1,2) to 7FJ(J= 0,1,2,3,4). The strongest emission peak is at 627nm and 617 nm, which belongs to the Eu3+ ions transition from 5D0→7F2. Moreover, the relative intensity of the emission peak (λ =627nm)is markedly stronger than that of the emission peak (λ=617 nm). Therefore, Gd2O2S:Eu3+ , Si4+, Ti4+emits the pure red light. What's more, the afterglow time of Gd2O2S:Eu3+ can be significantly increased when the Si4+ and Ti4+ are co-doped.
Keywords:Gd2O2S  Eu3+  Si4+  Ti4+  red long afterglow  Gd2O2S: Eu3+,Si4+,Ti4+  excitation spectrum  emission spectrum  phosphor
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