白光LED用MMoO_4∶Eu^(3+)红色荧光粉制备工艺研究  

Study on MMoO_4:Eu^(3+) red phosphor preparation process for white LED

作　　者：李勤勤[1] 关荣锋[1] 孙倩[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《化工新型材料》2011年第10期112-114,共3页New Chemical Materials

基　　金：河南基础与前沿科技项目(082300440150);河南省重点科技攻关项目(072102240027)

摘　　要：用溶胶-凝胶优化法合成了红色荧光粉MMoO4∶Eu3+(M=Ca、Sr、Ba),通过SEM、PL表征了荧光粉的形貌及发光性能。结果表明:烧结温度为800℃时,颗粒粒度分布均匀,粒径约为0.5-1μm,有很好的分散性;掺杂0.25molEu2O3在395nm和464nm两主激发峰下,均可得到616nm处红光发射极峰,属于Eu3+典型的5 D0→7F2的跃迁所致;助熔剂NH4F明显提高了钼酸盐荧光粉的发光强度;通过比较M0.5MoO4∶Eu03.+25,Li0+.25(M=Ca、Sr、Ba)发光性能得知:在395nm激发下,Ca0.5MoO4∶Eu30.+25,Li0+.25荧光粉最有利于提高发光强度。The MMoO4∶Eu3＋（M=Ca,Sr,Ba） red phosphors was synthesized by Sol-gel optimization method,and characterization of the morphology and luminescence properties of the phosphors were characterized by SEM and PL.The experiment results showed that under laboratory conditions,The optimum sintering temperature was 800℃,the red phosphors under the optimum conditions had the particle size distribution,the particle size of about 0.5-1μm and had a good dispersion.The optimum Eu2O3 content was 0.25mol.Under 394nm and 465nm excitation,which peaked 616nm,this red-orange emission at 611nm was due to the electric dipole transition,5D 0→7F2 of the Eu3＋ions.By doping flux NH4F,which significantly increased luminous intensity of the phosphors.To evaluate the emission intensity of the prepared M0.5MoO4：Eu3＋0.25,Li＋0.25（M=Ca、Sr、Ba） phorphor,which can be effectively excited by 395nm.The experimental results showed that luminescent intensity of the Ca0.5MoO4：Eu3＋0.25,Li＋0.25 phosphor was highest.

关 键 词：白光LED Sr(Ca Ba)MoO4:Eu3+ 红色荧光粉 溶胶-凝胶优化法 

分 类 号：TQ422[化学工程]