| Ca4Y6Si6O25:Eu2+绿色荧光粉的发光特性 |
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| 引用本文： | 杨志平,闻建伟,刘玉峰,李立虎,杨艳民,周东站,马淑媛,于红伟. Ca4Y6Si6O25:Eu2+绿色荧光粉的发光特性[J]. 发光学报, 2011, 32(1): 7-11. DOI: 10.3788/fgxb20113201.0007 |
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| 作者姓名： | 杨志平 闻建伟 刘玉峰 李立虎 杨艳民 周东站 马淑媛 于红伟 |
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| 作者单位： | 1. 河北大学 物理科学与技术学院, 河北 保定 071002;2. 河北大学 电子信息工程学院, 河北 保定 071002 |
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| 基金项目： | 国家自然科学基金(50902042); 河北省自然科学基金(F2009000217)资助项目 |
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| 摘 要： | 采用高温固相法合成了Ca4 Y6Si6O25:Eu2+绿色荧光材料.通过X射线衍射分析得知,Ca4Y6Si6O25属于六方晶系,具有P63/m(176)空间点群结构.测定了Eu2+的激发光谱和发射光谱.Ca4Y6Si6O25:Eu2+的激发光谱为350～450 nm的宽带谱,这与近紫外光LED芯片相匹配.发射光谱是峰值...
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| 关 键 词： | 发光 荧光粉 Ca4Y6Si6O25:Eu2+ 白光LED |
| 收稿时间： | 2010-04-15 |
| 修稿时间： | 2010-08-05 |
Luminescence Property of Ca4Y6Si6O25: Eu2+ Green Phosphor |
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| YANG Zhi-ping,WEN Jian-wei,LIU Yu-feng,LI Li-hu,YANG Yan-min,ZHOU Dong-zhan,MA Shu-yuan,YU Hong-wei. Luminescence Property of Ca4Y6Si6O25: Eu2+ Green Phosphor[J]. Chinese Journal of Luminescence, 2011, 32(1): 7-11. DOI: 10.3788/fgxb20113201.0007 |
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| Authors: | YANG Zhi-ping WEN Jian-wei LIU Yu-feng LI Li-hu YANG Yan-min ZHOU Dong-zhan MA Shu-yuan YU Hong-wei |
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| Affiliation: | 1. College of Physics Science and Technology, Hebei University, Baoding 071002, China;2. College of Electronic and Informational Engineering, Hebei University, Baoding 071002, China |
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| Abstract: | Ca4Y6Si6O25 ∶ Eu2+ green phosphor was prepared by high temperature solid-state reaction. The XRD speetrum indicates that Ca4Y6Si6O25 has a hexagonal crystal structure with a space group of P63/m(176). The excitation and emission spectra of Ca4Y6Si6O25 ∶ Eu2+ were measured when the mole fraction of Eu2+ was 20%. Its excitation spectrum is a broad band, from 350 nm to 450 nm, which matches with near ultraviolet LED chip. The emission spectrum of Ca4Y6Si6O25 ∶ Eu2+ exhibits an asymmetry broad band with the peak center at 527 nm, and it is because that Eu2+ takes the place of Ca2+ and forms two different luminescence centers. The effect of Eu2+ concentration on Ca4(1-x)Y6Si6O25 ∶ 4xEu2+ intensity was also investigated. With the increase of Eu2+ concentration, the luminescence intensity of the green phosphor get to maximum and then decrease. The optimal mole fraction of Eu2+ is 20%(x=0.05). According to Dexter theory, concentration quenching can be attributed to quadrupole-quadrupole interaction. |
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| Keywords: | Ca4Y6Si6O25:Eu2+ |
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