Synthesis and optical properties of Dy~（3＋）, Li~＋ doped CaMoO_4 phosphor

A series of CaMoO4 phosphors doped with trivalent dysprosium ions （Dy3＋） and lithium （Li＋） were prepared by solid state method at 750 °C for 3 h. X-ray diffraction （XRD） confirmed the crystal structure and quality of phosphors. Scanning electron microscopy （SEM） in- dicated that the phosphors presen...

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Published inJournal of rare earths Vol. 29; no. 6; pp. 540 - 543
Main Author 关丽 贾国奇 杨保柱 李旭 金立涛 杨志平 傅广生
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2011
Subjects
CaMoO 4:Dy 3
charge compensator
photoluminescence
rare earths
solid-state reaction
光学性质
合成
射线衍射
扫描电子显微镜
掺杂浓度
晶体结构
荧光粉
镝离子
solid-state reaction
photoluminescence
charge compensator
CaMoO 4:Dy 3
rare earths
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Summary:A series of CaMoO4 phosphors doped with trivalent dysprosium ions （Dy3＋） and lithium （Li＋） were prepared by solid state method at 750 °C for 3 h. X-ray diffraction （XRD） confirmed the crystal structure and quality of phosphors. Scanning electron microscopy （SEM） in- dicated that the phosphors presented good crystalline state, and the crystalline grain sizes were about 0.5–3.0 μm. The emission spectra showed that the phosphors had intense emission at 480 （4F9/2→6H15/2）, 576 （4F9/2→6H13/2） and 660 nm （4F9/2→6H11/2）. Meanwhile, the excited spectra indicated it had intense excitation at 352 （6H15/2→6P7/2）, 390 （6H15/2→4M21/2） and 450 nm （6H15/2→4I15/2）. As a charge compensator, Li＋ ions were incorporated into CaMoO4：Dy3＋ phosphors, which enhanced the PL intensities depending on the doping concentration of Li＋. The optimal molar fraction of Dy3＋ ions in Ca1-xMoO4：xDy3＋, 0.05Li＋ was 0.05.
Bibliography:11-2788/TF
A series of CaMoO4 phosphors doped with trivalent dysprosium ions （Dy3＋） and lithium （Li＋） were prepared by solid state method at 750 °C for 3 h. X-ray diffraction （XRD） confirmed the crystal structure and quality of phosphors. Scanning electron microscopy （SEM） in- dicated that the phosphors presented good crystalline state, and the crystalline grain sizes were about 0.5–3.0 μm. The emission spectra showed that the phosphors had intense emission at 480 （4F9/2→6H15/2）, 576 （4F9/2→6H13/2） and 660 nm （4F9/2→6H11/2）. Meanwhile, the excited spectra indicated it had intense excitation at 352 （6H15/2→6P7/2）, 390 （6H15/2→4M21/2） and 450 nm （6H15/2→4I15/2）. As a charge compensator, Li＋ ions were incorporated into CaMoO4：Dy3＋ phosphors, which enhanced the PL intensities depending on the doping concentration of Li＋. The optimal molar fraction of Dy3＋ ions in Ca1-xMoO4：xDy3＋, 0.05Li＋ was 0.05.
photoluminescence; CaMoO4：Dy3＋; charge compensator; solid-state reaction; rare earths
GUAN Li , JIA Guoqi , YANG Baozhu , LI Xu , JIN Litao , YANG Zhiping , FU Guangsheng （College of Physics Science and Technology, Hebei University, Baoding 071002, China）
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(10)60494-2