纳米粉体Y_2O_3:Ti^(3+),Eu^(3+)的光谱性能  

Spectroscopic properties of nanopowder Y_2O_3:Ti^(3+),Eu^(3+)

作　　者：曾贵平[1] 姚李[1] 董强[1] 鲍巍涛[1] 

机构地区：[1]合肥学院,安徽合肥230601

出　　处：《量子电子学报》2011年第2期147-151,共5页Chinese Journal of Quantum Electronics

摘　　要：采用共沉淀法在氮氢气氛中制备出Y_2O_3:Ti^(3+),Eu^(3+)纳米粉体,测量了它的XRD、激发与发射光谱,观测了形貌。通过与Y_2O_3:Ti^(3+)纳米粉体的光谱比较分析,发现Y_2O_3中的Ti^(3+)至Eu^(3+)存在能量传递,以致紫外至蓝光区域的光,均能使Eu^(3+)经~5D_0→~7F_2等跃迁通道发射出610 nm左右的荧光,于是增强了粉体在红橙光区发光的比重,因此可以调节粉体的发光性能。Y_2O_3:Ti^(3+),Eu^(3+)纳米粉体的吸收带从紫外延伸到蓝光区,强荧光带覆盖了整个可见光区,这预示它有望成为新一代白光LED或汞灯的光转换荧光粉。Y2O3：Ti^3＋,Eu^3＋ nanopowder was prepared by co-precipitation method in N2 and H2 atmosphere. Its XRD,excitation and emission spectra were measured,its morphology was observed.By analysis and comparison of spectra to Y2O3：Ti^3＋,Eu^3＋ with Y2O3：Ti^3＋,it was discovered that there exists energy transfer process from Ti^3＋ ions to Eu^3＋ ions,so Eu^3＋ ions can be excited by ultraviolet or blue light and emit fluorescence peaks at about 610 nm via ^6D0→^7F2 transition channel.As a result the fluorescence in the red and orange light area is strengthened,therefore luminescence properties of the powder may be adjusted.The excitation spectrum of Y2O3：Ti^3＋,Eu^3＋ nanopowder extends from ultraviolet to blue-green region,and the strong fluorescence covers entire visible light region.It indicates that Y2O3：Ti^3＋,Eu^3＋ nanopowder is expected to be a new generation light conversion phosphor for white LED or mercury lamp.

关 键 词：材料 荧光粉 纳米粉体 Y2O3:Ti^3+ Eu^3+ 

分 类 号：O433[机械工程—光学工程]