A novel white-emitting phosphor ZnWO4：Dy3

A new white luminescent material Dy3＋ doped ZnWO4 was synthesized by hydrothermal route followed by calcining proc- ess. The phase structure, morphology and luminescent properties of as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectro...

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Bibliographic Details
Published inJournal of rare earths Vol. 33; no. 4; pp. 350 - 354
Main Author 翟永清 李璇 刘佳 姜曼
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2015
Subjects
luminescence
phosphor
rare earths
white-emitting
X射线衍射仪
ZnWO4:Dy3
发射光谱
合成样品
扫描电子显微镜
白色发光
荧光分光光度法
荧光粉
镝掺杂
ZnWO4:Dy3
phosphor
white-emitting
luminescence
rare earths
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Summary:A new white luminescent material Dy3＋ doped ZnWO4 was synthesized by hydrothermal route followed by calcining proc- ess. The phase structure, morphology and luminescent properties of as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectrophotometry, respectively. The results indicated that the sample was pure ZnWO4：Dy3＋ only when the pH value of the reaction system was 6. The ZnWOa：Dy3＋ sample was composed of spherical particles, and the particle size was about 80-130 nm. The excitation spectrum consisted of a broad band ascribed to the charge transfer transi- tion from oxygen ligand to tungsten ion. The emission spectrum of ZnWO4：Dy3＋ was composed of two major parts： the broad band attributing to the intrinsic emission of WO42- and the 4F9/2→6H15/2 transition of Dy3＋, and the sharp emission peak corresponding to the 4F9/2→61-113/2 transition of Dy3＋. The optimal emission intensity of the Zn1-xWOa：Dy3＋x phosphors was realized when x= 1.5 mol. %. Moreover, all of the ZnI_xWOa：Dy3＋ （x=0.5 mol.%, 1 mol.%, 1.5 mol.%, 2 mol.%） phosphors could exhibit white light emission, which could be potentially applied in white lighting-emitting diodes.
Bibliography:white-emitting; ZnWO4：Dy3＋; phosphor; luminescence; rare earths
A new white luminescent material Dy3＋ doped ZnWO4 was synthesized by hydrothermal route followed by calcining proc- ess. The phase structure, morphology and luminescent properties of as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectrophotometry, respectively. The results indicated that the sample was pure ZnWO4：Dy3＋ only when the pH value of the reaction system was 6. The ZnWOa：Dy3＋ sample was composed of spherical particles, and the particle size was about 80-130 nm. The excitation spectrum consisted of a broad band ascribed to the charge transfer transi- tion from oxygen ligand to tungsten ion. The emission spectrum of ZnWO4：Dy3＋ was composed of two major parts： the broad band attributing to the intrinsic emission of WO42- and the 4F9/2→6H15/2 transition of Dy3＋, and the sharp emission peak corresponding to the 4F9/2→61-113/2 transition of Dy3＋. The optimal emission intensity of the Zn1-xWOa：Dy3＋x phosphors was realized when x= 1.5 mol. %. Moreover, all of the ZnI_xWOa：Dy3＋ （x=0.5 mol.%, 1 mol.%, 1.5 mol.%, 2 mol.%） phosphors could exhibit white light emission, which could be potentially applied in white lighting-emitting diodes.
11-2788/TF
ZHAI Yongqing , LI Xuan , LIU Jia , JIANG Man （College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China）
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60425-7