Sr_2MgSi_2O_7∶Eu,Nd体系中Eu^(2+)向Nd^(3+)的能量传递  

Efficient Energy Transfer from Eu^(2+) to Nd^(3+) in Sr_2MgSi_2O_7∶ Eu,Nd

作　　者：张凤金[1] 彭文芳[1] 李志威[1] 杨创涛[1] 孟建新[1,2] 

机构地区：[1]暨南大学化学系,广东广州510632 [2]暨南大学纳米化学研究所,广东广州510632

出　　处：《稀土》2011年第5期30-34,共5页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(30670523);广东省自然科学基金团队项目资助(05200555)

摘　　要：通过高温固相法合成了Sr2MgSi2O7∶Eu2+,Nd3+发光材料,测试了样品的物相结构、可见和近红外激发和发射光谱、荧光寿命等,研究了Eu2+对Nd3+的近红外发光性能的影响及近红外发光相对强度变化的规律,考察了煅烧温度、煅烧时间对近红外发光性能的影响。结果表明,1200℃下煅烧的Sr2MgSi2O7∶0.02Eu2+,0.01Nd3+样品近红外发光强度最强,Eu2+对Nd3+的近红外发光敏化效果最好。证实了在Sr2MgSi2O7∶Nd3+,Eu2+体系中Eu2+通过无辐射传递的模式向Nd3+有效传递了能量。The Sr2MgSi2O7∶ Eu2＋,Nd3＋ phosphors are synthesized by high temperature solid phase method and characterized by X-ray diffraction（XRD）,near-infrared luminescence（NIR）,fluorescence lifetime,excitation spectrum and emission spectrum,respectively.Effects of calcination temperature,calcination time and Eu2＋ concentration on the near-infrared light-emitting properties were investiqated.The result showed that the strongest NIR emission of the samples was obtained when sintered at 1200℃ for 2h and doped with 1% Eu2＋ and 2% Nd3＋.The efficiency of the energy transformation from Eu2＋ ions to Nd3＋ in crystals was obvious.

关 键 词：近红外发光 能量传递 高温固相法 Sr2MgSi2O7∶Eu2+ Nd3+ 

分 类 号：O614[理学—无机化学] TQ133.3[理学—化学]