摘要
使用超声波作用下的均匀沉淀法，制备了Eu0．10Y1．90-xNdxO3-δ纳米晶荧光粉，用X射线粉末衍射、荧光光谱等对其进行表征．研究了掺杂Nd^3＋离子对Y2O3：Eu^3＋晶格常数、晶粒尺寸及室温光致发光特性的影响．由不同掺杂浓度x=0～0．18下样品的发射光谱强度变化曲线得到猝灭浓度值，探讨了掺杂Nd^3＋的样品荧光浓度猝灭的机理．发光强度与浓度的关系表明，掺杂离子之间存在的Eu^3＋-Nd^＋或Nd^3＋-Nd^3＋间交换相互作用，是导致掺杂样品浓度猝灭的主要原因．
The nanophosphors Eu0.10Y1.90-xNdxO3-δ prepared by ultrasonic and homogeneous precipitation method was characterized by X-ray diffraction and fluorescence spectrum. The effects of Nd^3＋ ion doped on the lattice constants, grain sizes and room temperature photo-luminescent properties of Y2O3 ： Eu^3＋ nanocrystals were studied. The variance curve of emission intensity of Eu0.10Y1.90-xNdxO3-δ with x from 0 to 0. 18 were measured to get the quenching concentration. The mechanism of concentration quenching with Nd^3＋ doped was discussed. The dependences of the intensity on Nd^3＋ concentration show that the energy migrates among the Eu^3＋ and Nd^3＋ ions and is trapped finally by quenching centers.
出处
《分子科学学报》
CAS
CSCD
2007年第4期257-260,共4页
Journal of Molecular Science
基金
国家"863"计划资助项目(2004AA001520)
关键词
纳米荧光粉
光致发光
浓度猝灭
掺杂
nanophosphors
photoluminescent
concentration quenching
doped
