利用NH_4Cl提高Li_2SrSiO_4:Dy^(3+)的发光性能  

Improvement the Luminescent Properties of Li_2SrSiO_4:Dy^(3+) by Using NH_4Cl

作　　者：游潘丽[1,2] 尹光福[1] 黄忠兵[1] 姚亚东[1] 廖晓明[1] 陈显春[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]西昌学院工程技术学院,四川西昌615013

出　　处：《西昌学院学报（自然科学版）》2012年第3期47-51,共5页Journal of Xichang University(Natural Science Edition)

基　　金：国家自然科学基金(项目编号:No.60871062和50873066);四川省科技攻关重点项目(项目编号:2008SZ0021和2006Z08-001-1);教育部高等教育博士培养计划项目(项目编号:No.20070610131);西昌学院博士研究生资助课题

摘　　要：本文研究了NH4Cl助熔剂对Li2SrSiO4:1%Dy3+晶体结构、形貌、发光强度和色坐标的影响,并对其作用机理进行了探讨。研究表明,加入2%NH4Cl可以改变Li2SrSiO4:1%Dy3+的反应过程,形成适量液相,抑制杂相的产生并形成表面光滑的球形颗粒。加入2%NH4Cl,Li2SrSiO4:1%Dy3+发光强度提高了110%,色坐标(0.262,0.293)位于白光区域。The effect of NH4Cl flux on the crystal structure, morphology, luminous intensity and the Commission International del＇Eclairage （CIE）chromaticity coordinates of Li2SrSiO4： 1%Dy3＋ was discussed, and the mechanism of action of NH4Clflux was presented. The results indicated that the reaction process in the synthesis of Li2SrSiO4： 1% Dy3＋ could be changed due to the formation of proper fluid phase, and the purity phase with sphere-like grain and smooth surface was produced by using 2%NH,Cl. The luminous intensity of Li2SrSiO,： Dy3＋ was increased 110% by adding of 2%NH4Cl compared with that without NH4Cl, and the CIE chromaticity coordinates （0.262,0.293）moved toward the ideal white light coordinates.

关 键 词：白光LEDs Li2SrSiO4%Dy3+发光 NH4Cl助熔剂 黄蓝比(Y/B) 

分 类 号：TN312.8[电子电信—物理电子学] TN304