Eu2+andDy3+codoped（Ca,Sr）7（SiO3）6Cl2highlyefficientyellowphosphor

被引：4

作者：

刘冯新 ^{[1
]}

房永征 ^{[1
,2
]}

张娜 ^{[1
]}

候京山 ^{[3
]}

张灵彦 ^{[1
]}

于圣洁 ^{[1
]}

刘淑培 ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Shanghai Institute of Technology

[2] School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University

[3] College of Materials Science and Engineering, Donghua University

来源：

JournalofRareEarths | 2014年 / 32卷 / 09期

关键词：

self-flux method; yellow phosphor; luminescence; LED; rare earths;

D O I：

暂无

中图分类号：

TQ422 [光化学物质];

学科分类号：

0817 ;

摘要：

Eu2+ and Dy3+ codoped(Ca,Sr)7(SiO3)6Cl2 yellow phosphors were successfully synthesized by self-flux method. The structure, morphology and photoluminescence properties were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM) and photoluminescence spectra. The as-prepared phosphor showed a broad emission spectrum centered at 550 nm for Eu2+single-doped phosphor, while located at 548–544 nm for the Eu2+, Dy3+ codoped samples under excitation at 380 nm light. The emission intensity was greatly improved when Dy3+ was doped into the(Ca,Sr)7(SiO3)6Cl2:Eu2+ system. The composition-optimized sample with 3 mol.% of Dy3+ and constant 10 mol.% of Eu2+ exhibited a 220% PL enhancement compared to the phosphor with 10 mol.% Eu2+ single-doped. Meanwhile, it was found that the quantum efficiency of phosphor namely(Ca,Sr)7(SiO3)6Cl2:3 mol.% Dy3+, 10 mol.% Eu2+ could get up to 24.6%. The synthesized yellow-emitting(Ca,Sr)7(SiO3)6Cl2:Dy3+,Eu2+ is a promising candidate as high-efficiency yellow phosphor for NUV-excited white LEDs.

引用

页码：812 / 816

页数：5

共 3 条

[1] PreparationandluminescentpropertiesofMgTiO3:Eu3+phosphorforwhiteLEDs [J].

张健 ;

尹静 ;

刘盼盼 ;

高斌 ;

别利剑 .

JournalofRareEarths, 2012, 30 (10) :1009-1012

[2] Agreen-yellowemittingβ-Sr2SiO4:Eu2+phosphorfornearultravioletchipwhite-light-emittingdiode [J].

孙晓园 ;

张家骅 ;

张霞 ;

骆永石 ;

王笑军 .

Journal of Rare Earths, 2008, (03) :421-424

[3]

Garnet-based red emitting phosphors Li 6 MLa 2 Nb 2 O 12 : Eu 3+ (M=Ca, Sr, Ba): Photoluminescence improvement by changing crystal lattice[J] . Fengxin Liu,Yongzheng Fang,Jingshan Hou,Na Zhang,Zifeng Ma.Ceramics International . 2014 (2)

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