Synthesis and characterization of Zn2GeO4:Mn2+ phosphor for field emission displays

被引:31
作者
Zhang, Qiuhong [1 ,2 ]
Wang, Jing [1 ]
机构
[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, State Key Lab Optoelect Mat & Technol, Minist Educ,Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China
[2] Guangzhou Res Inst Nonferrous Met, Rear Earth Met Res Dept, Guangzhou 510651, Guangdong, Peoples R China
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2012年 / 108卷 / 04期
关键词
LOW-VOLTAGE CATHODOLUMINESCENCE; ZNGA2O4; PHOSPHOR; FILM; BLUE; LUMINESCENCE;
D O I
10.1007/s00339-012-7003-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Zn2-2xMn2xGeO4 (x = 0, 0.001, 0.01) phosphors were prepared by conventional solid state reaction technique. X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), diffuse reflection spectra, photoluminescence (PL), and cathodoluminescence (CL) spectroscopy were utilized to characterize the synthesized phosphors. The Mn2+-activated Zn2GeO4 phosphors exhibit narrow emission band at 532 nm under the excitation of ultraviolet light, which due to the T-4(1)((4)G)-(6)A(1)(S-6) transition of Mn2+ ions. Also it is observed that there exists energy transfer between the Zn2GeO4 host lattice and the activator (Mn2+). Under excitation of low-voltage electron beams, Zn2GeO4:Mn2+ shows strong green emission band dominating at 535 nm, corresponding to the T-4(1)((4)G)-(6)A(1)(S-6) emission of Mn2+ ions. The emission intensity and chromaticity coordinates of Zn2GeO4:Mn2+ as a function of accelerating voltage and the filament current were also investigated.
引用
收藏
页码:943 / 948
页数:6
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