| Luminescence enhancement of BaMgSiO4：Eu^2＋ by adding borate as flux |
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| 引用本文： | 乌凤岐,王稼国,荆西平,严纯华,林建华,廖复辉.Luminescence enhancement of BaMgSiO4：Eu^2＋ by adding borate as flux[J].中国稀土学报(英文版),2008,26(1):26-30. |
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| 作者姓名： | 乌凤岐 王稼国 荆西平 严纯华 林建华 廖复辉 |
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| 作者单位： | [1]Beijing National Laboratory for Molecular Sciences, the State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry andMolecular Engineering, Peking University, Beijing 100871, China [2]College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China [3]Fuxin Advanced Polytechnic College, Fuxin 123000, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，浙江省高科技研究项目 |
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| 摘 要： | The luminescence of EU^2＋ in BaMgSiO4 with BaB2O4 as flux was studied. The emission spectrum of the phosphor consisted of two bands, peaking at about 398 nm and 515 nm, which were attributed to the emissions from different Eu^2＋ sites in the lattice. When the BaB2O4 flux was applied, the intensity of the 398 nm emission was not clearly affected, but the intensity of the 515 nm emission was enhanced by about ten times. Gaussian fitting showed that the emission band at around 515 nm could actually be resolved into two bands with peak wavelengths of 499 nm and 521 nm, respectively. The assignments of the emission bands to the cation sites were carried out according to the values of bond valence. The overlapping of the 398 nm emission band on the excitation band of 515 nm emission implied that energy transfer could occur from the luminescent center related to the 398 nm emission to the center related to the 515 nm emission, and the energy transfer process remarkably enhanced the intensity of the 515 nm emission band. The phosphor had strong excitation at around 350-400 nm and emitted a bright green luminescence. Thus it could have applications as a green component in solid-state lighting devices assembled by near-UV Light Emitting Diodes （LED） combined with tricolor phosphors.
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| 关 键 词： | 发光特性 稀土元素 硼酸盐 铕 |
| 收稿时间： | 2007-05-29 |
| 修稿时间： | 2007-08-01 |
Luminescence enhancement of BaMgSiO4:Eu by adding borate as flux |
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| Fengqi WU, Jiaguo WANG, Xiping JING, Chunhua YAN, Jianhua LIN,Fuhui LIAO.Luminescence enhancement of BaMgSiO4:Eu by adding borate as flux[J].Journal of Rare Earths,2008,26(1):26-30. |
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| Authors: | Fengqi WU Jiaguo WANG Xiping JING Chunhua YAN Jianhua LIN Fuhui LIAO |
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| Affiliation: | aBeijing National Laboratory for Molecular Sciences, the State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;bCollege of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China;cFuxin Advanced Polytechnic College, Fuxin 123000, China |
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| Abstract: | The luminescence of Eu2 in BaMgSiO4 with BaB2O4 as flux was studied. The emission spectrum of the phosphor consisted of two bands, peaking at about 398 nm and 515 nm, which were attributed to the emissions from different Eu2 sites in the lattice. When the BaB2O4 flux was applied, the intensity of the 398 nm emission was not clearly affected, but the intensity of the 515 nm emission was enhanced by about ten times. Gaussian fitting showed that the emission band at around 515 nm could actually be resolved into two bands with peak wavelengths of 499 nm and 521 nm, respectively. The assignments of the emission bands to the cation sites were carried out according to the values of bond valence. The overlapping of the 398 nm emission band on the excitation band of 515 nm emission implied that energy transfer could occur from the luminescent center related to the 398 nm emission to the center related to the 515 nm emission, and the energy transfer process remarkably enhanced the intensity of the 515 nm emission band. The phosphor had strong excitation at around 350--400 nm and emitted a bright green luminescence. Thus it could have applications as a green component in solid-state lighting devices assembled by near-UV Light Emitting Diodes (LED) combined with tricolor phosphors. |
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| Keywords: | BaMgSiO4:Eu2 luminescence energy transfer flux solid state lighting rare earths |
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