Enhancing the photoluminescence intensity of CaTiO3：Eu3＋ red phosphors with magnesium

Red phosphors MgxCa1-xTiO3：Eu3＋ （0〈x〈0.5） were synthesized by solid-state reaction method. The crystalline structure and morphology of the as-prepared samples were confirmed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The luminescence property was measured using photoluminesce...

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Published inJournal of rare earths Vol. 33; no. 10; pp. 1036 - 1039
Main Author 张杰强 范艳伟 陈朝阳 王军华 赵鹏君 郝斌
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2015
Subjects
CaTiO3
Mg2+ concentration
photoluminescence
rare earths
red phosphor MgxCa1–xTiO3:Eu3
X-射线衍射
光致
发光强度
扫描电子显微镜
氮化镓发光二极管
红色荧光粉
颗粒大小分布
Mg2+ concentration
photoluminescence
red phosphor MgxCa1–xTiO3:Eu3
rare earths
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(14)60523-8

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Summary:Red phosphors MgxCa1-xTiO3：Eu3＋ （0〈x〈0.5） were synthesized by solid-state reaction method. The crystalline structure and morphology of the as-prepared samples were confirmed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The luminescence property was measured using photoluminescence excitation and photoluminescence emission spectra. Results showed that spherical particles appeared in the phosphor bodies and size of the phosphor particles were tmiformly distributed in the range of 600-800 nm when the Mg2＋ concentration was about 40 mol.%. It could readily be seen that the strongest PL emission was located at 617 nm monitored at 398 nm, which well matched with the near ultraviolet （NUV, 395400 nm） GaN-LEDs. More importantly, PL emission intensity （617 nm） of phosphor Mg0.nCa0.6TiO3：0.03Eu3＋ was 4.26 times of that of phosphor CaTiO3：0.03Eu3＋ Based on these results, it implied that the PL intensity of phosphorCaTiO3：0.03Eu3＋ could be significantly enhanced by introducing Mg2＋ into CaTiO3 host lattices and the phosphor Mg0.4Ca0.6TiO3：0.03Eu3＋ might be the promising red-emitting phosphor in making tricolor phosphor converted white-LEDs.
Bibliography:red phosphor MgxCa1-xTiO3：Eu3＋Mg 2＋ concentration; photoluminescence; rare earths
Red phosphors MgxCa1-xTiO3：Eu3＋ （0〈x〈0.5） were synthesized by solid-state reaction method. The crystalline structure and morphology of the as-prepared samples were confirmed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The luminescence property was measured using photoluminescence excitation and photoluminescence emission spectra. Results showed that spherical particles appeared in the phosphor bodies and size of the phosphor particles were tmiformly distributed in the range of 600-800 nm when the Mg2＋ concentration was about 40 mol.%. It could readily be seen that the strongest PL emission was located at 617 nm monitored at 398 nm, which well matched with the near ultraviolet （NUV, 395400 nm） GaN-LEDs. More importantly, PL emission intensity （617 nm） of phosphor Mg0.nCa0.6TiO3：0.03Eu3＋ was 4.26 times of that of phosphor CaTiO3：0.03Eu3＋ Based on these results, it implied that the PL intensity of phosphorCaTiO3：0.03Eu3＋ could be significantly enhanced by introducing Mg2＋ into CaTiO3 host lattices and the phosphor Mg0.4Ca0.6TiO3：0.03Eu3＋ might be the promising red-emitting phosphor in making tricolor phosphor converted white-LEDs.
ZHANG Jieqiang, FAN Yanwei , CHEN Zhaoyang, WANG Junhua , ZHAO Pengjun HAO Bin （1. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Technical Institute of Physics ＆ Chemistry of CAS, Urumqi 830011, China, 2. Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics ＆ Chemistry of CAS, Urumqi 830011, China, 3. University of Chinese Academy of Sciences, Beijing 100049, China）
11-2788/TF
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60523-8