KLa(MoO_4)_2∶Eu^(3+)红色荧光粉的合成和发光性能  

Synthesis and luminescence characteristics of KLa(MoO_4)_2∶Eu^(3+) red-emitting phosphors

作　　者：李勇军[1] 刘胜利[1] 刘阿情 张慧[1] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《化学研究》2015年第5期491-495,共5页Chemical Research

基　　金：湖南省高校科技创新平台开放基金项目(09K082)

摘　　要：采用高温固相法制备了KLa(MoO4)2∶Eu3+红色荧光粉,对其物相结构、光谱性质进行了分析,研究了Eu3+的不同掺杂浓度对荧光粉的发光性能的影响,同时对其色坐标进行了分析.结果表明,KLa(MoO4)2为体心对称的单斜相;KLa(MoO4)2∶Eu3+荧光粉中Eu3+的最佳掺杂浓度为9%,当掺杂浓度大于9%出现浓度猝灭现象,出现这一现象的主要原因是由于交换作用导致Eu3+之间能量的转移.In this paper KLa（MoO4 ）2 ∶ Eu3＋ red fluorescence powder was prepared by high temperature solid phase method .The phase structure ,spectroscopic properties were analyzed , and the influence of Eu3＋ doped with different concentration of phosphor luminescence proper‐ties was studied .Meanwhile its color coordinates were analyzed .It shows that KLa（MoO4 ）2 is a body centrosymmetric monoclinic phase;the concentration quenching of KLa（MoO4 ）2 ∶Eu3＋is mainly due to the exchange interaction leads to energy transfer between Eu3＋ and KLa （MoO4 ）2 ∶Eu3＋ phosphors ,and the optimal doping concentration of Eu3＋ is 9% .When doping concentration is higher than 9% ,concentration quenching effect occurs .

关 键 词：白光LED 红色荧光粉 钼酸盐 高温固相法 

分 类 号：O616[理学—无机化学]