| Vacuum ultraviolet excited photoluminescence properties of Gd2O2CO3：Eu^3＋ phosphor |
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| 引用本文： | 王志龙,王育华,张加弛. Vacuum ultraviolet excited photoluminescence properties of Gd2O2CO3：Eu^3＋ phosphor[J]. 中国稀土学报(英文版), 2008, 26(3): 425-427. DOI: 10.1016/S1002-0721(08)60110-6 |
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| 作者姓名： | 王志龙 王育华 张加弛 |
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| 作者单位： | Department of Material Science, Lanzhou University, Lanzhou 730000, China |
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| 基金项目： | Project supported by the Program for New Century Talents in the University of China （NCET, 04-0978） and the Chinese Specialized Research Fund for the Doctoral Program of Higher Education （SRFDP 20040730019） |
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| 摘 要： | The Gd2O2CO3：Eu^3＋ with type-Ⅱ structure phosphor was successfully synthesized via flux method at 400 ℃ and their photoluminescence properties in vacuum ultraviolet （VUV） region were examined. The broad and strong excitation bands in the range of 153-205 nm owing to the CO3^2- host absorption and charge transfer （CT） of Gd^3＋-O2^- were observed for Gd2O2CO3：Eu^3＋. Under 172 nm excitation, Gd2O2CO3：Eu^3＋ exhibited strong red emission with good color purity, indicating Eu^3＋ ions located at low symmetry sites and the chromaticity coordination of luminescence for Gd2O2CO3：Eu^3＋ was （x=0.652, y=0.345）. The photoluminescence quenching concentration of Eu^3＋ excited by 172 nm for Gd2O2CO3：Eu^3＋ was about 5%. Gd2O2CO3：Eu^3＋ would be a potential VUV-excited red phosphor applied in mercury-free fluorescent lamps.
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| 关 键 词： | Gd2O2CO3:Eu^3+ 真空 紫外线 稀土 |
| 收稿时间： | 2007-09-20 |
Vacuum ultraviolet excited photoluminescence properties of Gd2O2CO3:Eu phosphor |
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| Zhilong WANG, Yuhua WANG,Jiachi ZHANG. Vacuum ultraviolet excited photoluminescence properties of Gd2O2CO3:Eu phosphor[J]. Journal of Rare Earths, 2008, 26(3): 425-427. DOI: 10.1016/S1002-0721(08)60110-6 |
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| Authors: | Zhilong WANG Yuhua WANG Jiachi ZHANG |
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| Affiliation: | aDepartment of Material Science, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | The Gd2O2CO3:Eu3+ with type-II structure phosphor was successfully synthesized via flux method at 400 °C and their photoluminescence properties in vacuum ultraviolet (VUV) region were examined. The broad and strong excitation bands in the range of 153–205 nm owing to the CO32– host absorption and charge transfer (CT) of Gd3+-O2– were observed for Gd2O2CO3:Eu3+. Under 172 nm excitation, Gd2O2CO3:Eu3+ exhibited strong red emission with good color purity, indicating Eu3+ ions located at low symmetry sites and the chromaticity coordination of luminescence for Gd2O2CO3:Eu3+ was (x=0.652, y=0.345). The photoluminescence quenching concentration of Eu3+ excited by 172 nm for Gd2O2CO3:Eu3+ was about 5%. Gd2O2CO3:Eu3+ would be a potential VUV-excited red phosphor applied in mercury-free fluorescent lamps. |
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| Keywords: | Gd2O2CO3:Eu3+ vacuum ultraviolet phosphor rare earths |
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