| Luminescence properties of Eu2＋ -doped Ba3Si6O12N2 green phosphor： concentration quenching and thermal stability |
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| 引用本文： | 陈观通,庄卫东,胡运生,刘元红,刘荣辉,何华强. Luminescence properties of Eu2＋ -doped Ba3Si6O12N2 green phosphor： concentration quenching and thermal stability[J]. 中国稀土学报(英文版), 2013, 31(2): 113-118. DOI: 10.1016/S1002-0721(12)60243-9 |
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| 作者姓名： | 陈观通 庄卫东 胡运生 刘元红 刘荣辉 何华强 |
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| 作者单位： | National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,and Grirem Advanced Materials Co.,Ltd. |
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| 基金项目： | Project supported by National Natural Science Foundation of China(51102021);the Natural Science Foundation of Beijing(2102022);the National High Technology Research and Development Program of China(2010AA03A404,2011AA03A101) |
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| 摘 要： | The efficient Eu2+ -doped Ba3 Si6O12N2 green phosphors were prepared by a traditional solid state reaction method under N2 /H2 atmosphere at a temperature up to 1350 oC for 12h. Photoluminescence (PL) properties showed a broad emission band with a peak of 525 nm and the full width of half-emission maximums (FWHM) of 70 nm under 460 nm light irradiation. The X-ray diffraction patterns (XRD) and scanning electron microscope (SEM) images of the synthesized powder demonstrated its pure phase and excellent crystallization. Quenching concentration in this phosphor was found to be 0.3. The mechanisms of concentration quenching and redshift of emission peak with increasing concentration of Eu2+ were studied. The temperature dependence measurement of this green phosphor revealed excellent thermal quenching property compared to silicate green phosphor. It is believed that Ba3 Si6O12N2 :Eu2+ is an excellent green phosphor for UV or blue chip based white LEDs.
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| 关 键 词： | 绿色荧光粉 猝灭浓度 发光特性 热稳定性 淬火 掺杂 扫描电子显微镜 温度依赖性 |
| 收稿时间： | 2012-08-23 |
Luminescence properties of Eu2+ -doped Ba3Si6O12N2 green phosphor: concentration quenching and thermal stability |
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| CHEN Guantong , ZHUANG Weidong , HU Yunsheng , LIU Yuanhong , LIU Ronghui , HE Huaqiang. Luminescence properties of Eu2+ -doped Ba3Si6O12N2 green phosphor: concentration quenching and thermal stability[J]. Journal of Rare Earths, 2013, 31(2): 113-118. DOI: 10.1016/S1002-0721(12)60243-9 |
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| Authors: | CHEN Guantong ZHUANG Weidong HU Yunsheng LIU Yuanhong LIU Ronghui HE Huaqiang |
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| Affiliation: | (National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, and Grirem Advanced Materials Co., Ltd., Beijing 100088, China) |
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| Abstract: | The efficient Eu2+-doped Ba3Si6O12N2 green phosphors were prepared by a traditional solid state reaction method under N2/H2 atmosphere at a temperature up to 1350 °C for 12 h. Photoluminescence (PL) properties showed a broad emission band with a peak of 525 nm and the full width of half-emission maximums (FWHM) of 70 nm under 460 nm light irradiation. The X-ray diffraction patterns (XRD) and scanning electron microscope (SEM) images of the synthesized powder demonstrated its pure phase and excellent crystallization. Quenching concentration in this phosphor was found to be 0.3. The mechanisms of concentration quenching and redshift of emission peak with increasing concentration of Eu2+ were studied. The temperature dependence measurement of this green phosphor revealed excellent thermal quenching property compared to silicate green phosphor. It is believed that Ba3Si6O12N2:Eu2+ is an excellent green phosphor for UV or blue chip based white LEDs. |
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| Keywords: | oxynitride phosphor white LEDs photoluminescence concentration quenching thermal stability rare earths |
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