摘要
采用水热合成法制备红色荧光粉Ca0.70Sr0.18-0.15xMoO4:0.08Eu3+,xY3+.用XRD、荧光分光光度计、SEM对其物相、发光性能以及形貌进行测试和表征.结果表明:荧光粉为CaMoO4物相结构.荧光粉粒径小且粒度分布均匀.荧光粉在395 nm和465 nm的吸收分别与紫外光和蓝光LED芯片输出波长相匹配.分别采用395 nm的近紫外光和465 nm的可见光激发样品,Ca0.70Sr0.18-0.15xMoO4:0.08Eu3+,xY3+荧光粉发红光,主发射峰位于616 nm.Y3+的引入,把自身吸收的能量和基质吸收的部分能量传递给发光中心,使Eu3+发光强度进一步增强.红色荧光粉Ca0.70Sr0.09MoO4:0.08Eu3+,0.06Y3+色坐标比商用的Y2O3:Eu3+红色荧光材料更接近于标准红色色坐标.
The red phosphor Ca0.70Sr0.18-0. 15xMoO4：0.08Eu3 ＋ ,xY3＋ was prepared by hydrothermal synthesis method. The crystalline phase, morphology and luminescence characteristics of the phosphor particles were characterized by X-ray diffractometer （XRD）, fluorophotometer and scanning electron microsco- py （SEM）. The results showed that the phosphor was with CaMoO4 crystalline phase. The phosphor had the advantages of small particle size and the uniform particle size distribution. The excitation and emission spectra showed that this phosphor could be effectively excited by ultraviolet（395 nm） and blue light（465 nm）, which could match ultra-violet and blue chips in light-emitting diodes application. Upon excitation with 395 nm and 465 nm light, all the Ca0.70 Sr0.18-0 15xMoO4 ： 0.08Eu3 ＋ , xY3 ＋ phosphors showed bright red emission, and the main emission peak lie 616 nm. The luminescence properties of EU3＋ ions in Ca0.70Sr0.18 -0.15xMoO4：0.08Eu3＋ ,xY3 ＋ could be evidently improved by co-doping of y3 ＋ ions, which was due to the efficient energy transfer process from y3 ＋ to Eu3＋ ions. The chromaticity coordinates of Ca0.70Sr0.09MoO4：0.08Eu3＋ ,0.06Y3＋ were closer to the standard red than that of Y2O3 ：Eu3＋ .
出处
《沈阳化工大学学报》
CAS
2014年第3期198-201,247,共5页
Journal of Shenyang University of Chemical Technology
基金
辽宁省教育厅科研项目计划(LS2010119)
关键词
红色荧光粉
水热合成
钼酸盐
red phosphor
hydrothermal synthesis
molybdate
