Ba_(1-x)Sr_xMgSiO_4:Eu^(2+),Mn^(2+): A novel tunable single-matrix tricolor phosphor for W-LED  

作　　者：杨创涛 谢丽娟 肖全兰 刘关喜 彭文芳 孟建新 

机构地区：[1]Department of Chemistry,Jinan University [2]Institute of Nano-Chemistry,Jinan University

出　　处：《Journal of Rare Earths》2012年第2期110-113,共4页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (30670523);the Fundamental Research Funds for the Central Universities

摘　　要：The Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ phosphors were prepared by solid-state reaction. Their photoluminescence properties were inves-tigated with fluorescence spectrum and CIE chromaticity. The emission color of Eu2＋ in Ba0.98-xSrxMgSiO4：0.02Eu2＋ could be tuned from green to blue by adjusting the content of Sr2＋. The blue emission of Eu2＋ overlapped well with the excitation spectra of Mn2＋, leading to an ef-ficient energy transfer from Eu2＋ to Mn2＋ in Ba0.98-xSrxMg1-ySiO4：0.02Eu2＋,yMn2＋. Ba0.93Sr0.03Mg1-ySiO4：0.02Eu2＋,yMn2＋ could emit three ef-ficient broad bands at 440, 530 and 640 nm. The emission color of Ba0.93Sr0.03Mg1-ySiO4：0.02Eu2＋,yMn2＋ could be tuned from greenish blue to yellowish white by increasing the content of Mn2＋ from 0 to 0.1. By changing the content of Sr2＋/Mn2＋, white-light with different hues could be conveniently obtained in the Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ phosphors. The results showed that Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ is a promising single-phased tricolor phosphor in the fabrication of W-LED.The Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ phosphors were prepared by solid-state reaction. Their photoluminescence properties were inves-tigated with fluorescence spectrum and CIE chromaticity. The emission color of Eu2＋ in Ba0.98-xSrxMgSiO4：0.02Eu2＋ could be tuned from green to blue by adjusting the content of Sr2＋. The blue emission of Eu2＋ overlapped well with the excitation spectra of Mn2＋, leading to an ef-ficient energy transfer from Eu2＋ to Mn2＋ in Ba0.98-xSrxMg1-ySiO4：0.02Eu2＋,yMn2＋. Ba0.93Sr0.03Mg1-ySiO4：0.02Eu2＋,yMn2＋ could emit three ef-ficient broad bands at 440, 530 and 640 nm. The emission color of Ba0.93Sr0.03Mg1-ySiO4：0.02Eu2＋,yMn2＋ could be tuned from greenish blue to yellowish white by increasing the content of Mn2＋ from 0 to 0.1. By changing the content of Sr2＋/Mn2＋, white-light with different hues could be conveniently obtained in the Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ phosphors. The results showed that Ba1-xSrxMgSiO4：Eu2＋,Mn2＋ is a promising single-phased tricolor phosphor in the fabrication of W-LED.

关 键 词：PHOSPHORS LUMINESCENCE energy transfer rare earths 

分 类 号：TN104.3[电子电信—物理电子学]