用于白光LED的荧光粉Sr_3MgSi_2O_8:Eu^(2+)的发光特性  

Luminescence Properties of Phosphor Sr_3MgSi_2O_8:Eu^(2+) for White LEDs

作　　者：林林[1] 庄国华[1] 丘志海[1] 徐贵华[1] 冯卓宏[1] 郑志强[1] 尹民[2] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福建福州350108 [2]中国科技大学物理系,安徽合肥230026

出　　处：《福建师范大学学报（自然科学版）》2011年第2期52-56,共5页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省科技重大专项课题(2007HJ0004-2);福建省青年人才创新项目(2007F3027);福建省科技厅K类资助项目(2006F5025);福建省教育厅资助项目(JB08063)

摘　　要：使用高温固相法制备不同NH4Cl(作为助熔剂)加入量和不同Eu2+浓度的Sr3MgSi2O8:Eu2+,并研究其成相和发光性质.研究结果表明:NH4Cl加入量为24%时,样品为纯相,发光最强.Sr3MgSi2O8:Eu2+样品在近紫外区存在强激发带(250~400 nm),谱峰位于366 nm;相应的发射谱带位于蓝光区(420~500nm),为一个不对称宽带,谱峰位于457 nm,该发射带由两个发射峰组成,其位置较接近,因此不能复合出白光,Sr3MgSi2O8:Eu2+仅适合作为紫外LED芯片激发的蓝光荧光粉.The Sr3MgSi2O8：Eu2＋ samples with different NH4Cl（as flux） content and different Eu2＋ concentration were prepared by the solid-state reaction.The phase purity and luminescence properties of samples were studied.The results indicate that the sample is single phase with highest luminescence intensity,while the content of NH4Cl is 24%.The strong excitation band of the sample is in the NUV region （250-400 nm）,peaked at 366 nm.Corresponding emission band is in the blue region（420-500 nm）,peaked at 457 nm.This band consists of two emission peaks.The positions of two peaks are approximate,so white light can not be generated.It is confirmed that Sr3MgSi2O8：Eu^2＋ can only be applied as blue phosphor with the NUV LED chips.

关 键 词：发光特性 荧光粉 白光LED Sr3MgSi2O8:Eu2+ 

分 类 号：O433[机械工程—光学工程] O614.33[理学—光学]