Enhancement of luminescence intensity and color purity of MgxZn1-xMoO4：Eu3＋,Bi3＋ phosphors

ZDAMoO4：Eu3＋ red phosphors co-doped with Mg2＋ and Bi3＋ were synthesized using a solid-state reaction. X-ray powder diffraction, scanning electron microscopy, and photoluminescence analysis were used for characterizing the phosphors. The introduction of Mg2＋ into a Zn2＋ site further enhanced the emis...

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Published inJournal of rare earths Vol. 33; no. 10; pp. 1064 - 1071
Main Author 莫福旺 陈培灿 关安翔 张伟 周立亚
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2015
Subjects
luminescence
optical materials
rare earths
X-ray diffraction
发光强度
固相反应法
扫描电子显微镜
淬火温度
离子掺杂
紫外光吸收
红色荧光粉
颜色纯度
X-ray diffraction
luminescence
optical materials
rare earths
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Summary:ZDAMoO4：Eu3＋ red phosphors co-doped with Mg2＋ and Bi3＋ were synthesized using a solid-state reaction. X-ray powder diffraction, scanning electron microscopy, and photoluminescence analysis were used for characterizing the phosphors. The introduction of Mg2＋ into a Zn2＋ site further enhanced the emission intensity of the 5D0→VF2 transition since the asymmetry ofa Eu3＋ site increased when Zn2＋ was substituted by Mg2＋. The co-doped Bi3＋ efficiently sensitized the emission of Eu3＋ and effectively extended the absorption of near-ultraviolet light with wavelengths ranging from 300 to 370 nm. The high color purity of Mg0.10Zn0.84MoO4：Eu0.053＋,Bi0.013＋ was calculated to be 91.80%. The thermal quenching temperature Td was about 387 K and the activation energy for thermal quench- ing was found to be about 0.31 eV for Mg0.10Zn0.84MoO4.Eu0.053＋,Bi0.013＋, respectively. Moreover, the results revealed that the energy transfer was more effective when the Zn0.95MoO4：Eu0.053＋ phosphors were co-doped with Mg2＋ ions and Bi3＋ ions than those doped only with Mg2＋ ions.
Bibliography:ZDAMoO4：Eu3＋ red phosphors co-doped with Mg2＋ and Bi3＋ were synthesized using a solid-state reaction. X-ray powder diffraction, scanning electron microscopy, and photoluminescence analysis were used for characterizing the phosphors. The introduction of Mg2＋ into a Zn2＋ site further enhanced the emission intensity of the 5D0→VF2 transition since the asymmetry ofa Eu3＋ site increased when Zn2＋ was substituted by Mg2＋. The co-doped Bi3＋ efficiently sensitized the emission of Eu3＋ and effectively extended the absorption of near-ultraviolet light with wavelengths ranging from 300 to 370 nm. The high color purity of Mg0.10Zn0.84MoO4：Eu0.053＋,Bi0.013＋ was calculated to be 91.80%. The thermal quenching temperature Td was about 387 K and the activation energy for thermal quench- ing was found to be about 0.31 eV for Mg0.10Zn0.84MoO4.Eu0.053＋,Bi0.013＋, respectively. Moreover, the results revealed that the energy transfer was more effective when the Zn0.95MoO4：Eu0.053＋ phosphors were co-doped with Mg2＋ ions and Bi3＋ ions than those doped only with Mg2＋ ions.
11-2788/TF
MO Fuwang CHEN Peican GUAN Anxiang ZHANG Wei ZHOU Liya （School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China）
optical materials; luminescence; X-ray diffraction; rare earths
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60527-5