Ca_2BO_3Cl:Eu^(2+),Nd^(3+)的近红外发光与能量传递  

Energy transfer and near-infrared luminescence of Ca_2BO_3Cl:Eu^(2+) and Nd^(3+)

作　　者：万垂铭[1] 张凤金[1] 邓小玲[1] 杨创涛[1] 孟建新[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：《中南大学学报（自然科学版）》2011年第6期1555-1559,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(30670523);广东省自然科学基金团队资助项目(05200555)

摘　　要：用高温固相法制备Ca2BO3Cl:Eu2+,Nd3+近红外发光材料,并运用X线衍射、近红外发光光谱、激发光谱和发射光谱等手段对材料进行表征;研究Eu2+对Nd3+近红外发光性能的影响及相对强度变化的规律,探讨该体系中Eu2+对Nd3+的能量传递机理。研究结果表明:Eu2+的掺入可提高Nd3+的近红外发光强度,当Eu2+和Nd3+的掺杂量(质量分数)分别为3%和5%时,近红外发光最强;Eu2+通过无辐射传递方式向Nd3+有效地传递能量,对Nd3+近红外光有很好的敏化作用。A novel near-infrared（NIR） luminescence phosphors Ca2BO3Cl：Eu2＋,Nd3＋ was synthesized by conventional solid state reaction and characterized with X-ray diffraction（XRD）,fluorescence spectrum（FL）,photoluminescence excitation spectrum（PLE） and photoluminescence emission spectrum（PL）.The effect of doped Eu2＋ and Nd3＋ concentration on the near-infrared（NIR） luminescence intensity was investigated.The Eu2＋→Nd3＋ energy transfer mechanism was also discussed.The results show that near-infrared luminescence of Nd3＋ in Ca2BO3Cl can be greatly enhanced by co-doping of Eu2＋.The optimized contents of Eu2＋ and Nd3＋ are 3% and 5%,respectively.Efficient energy transfer from Eu2＋ to Nd3＋ results in great enhancement NIR fluorescence of Nd3＋.

关 键 词：近红外发光 Ca2BO3Cl:Eu2+ Nd3+ 能量传递 高温固相法 

分 类 号：O614[理学—无机化学]