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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Eu2+离子在Sr2Al6O11基磷光体中发光行为的研究

赵淑金1,2; 林元华2; 张中太2; 南策文2   

  1. 1. 佳木斯大学材料工程学院, 佳木斯 154007; 2. 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室, 北京 100084
  • 收稿日期:2001-12-24 修回日期:2002-02-04 出版日期:2003-01-20 网络出版日期:2003-01-20

Luminescence of Eu2+ in Sr2Al6O11-Based Phosphor

ZHAO Shu-Jin1,2; LIN Yuan-Hua2; ZHANG Zhong-Tai2; NAN Ce-Wen2   

  1. 1.School of Materials Engineering; Jiamusi University; Jiamusi 154007; China; 2.Department of Materials Science and Engineering; State Key Laboratory of New Ceramics and Fine Processing; Tsinghua University; Beijing 100084; China
  • Received:2001-12-24 Revised:2002-02-04 Published:2003-01-20 Online:2003-01-20

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摘要： 研究了不同Eu掺杂浓度对Sr2Al6O11基磷光体发光性能的影响.结果发现,当Eu掺杂浓度低于0.01mol时,在其发射光谱中存在403和493nm的主发射峰,对应着Sr2Al6O11基质中Sr的两种不同位置Sr1和Sr2位.随着Eu掺杂浓度增加,由于能量传递作用,导致403nm的发射峰消失,493nm的发射峰增强.余辉衰减曲线表明,未掺杂Dy的磷光体没有余辉性能,当Eu掺杂量在0.01mol时,余辉性能最好.进一步提高Eu的掺杂量,由于浓度猝灭作用,导致发光性能下降.

关键词: 磷光体, 发射光谱, 长余辉

Abstract: The effects of different doping concentration of Eu2+ on the properties of Sr2Al6O11-based phosphor
were studied. The results indicate that there are two main emission peaks at 403nm and 493nm existing in the phosphor, while the doping concentration
of Eu2+ is below 0.01mol, which are corresponding to various Sr1 and Sr2 sites in the Sr2Al6O11 matrix. While increasing the doping
concentration of Eu2+, the emission peak of 403nm disappears and the peak of 493nm becomes strong simultaneously due to the energy transfer
between the different Eu2+ centers. Decay curves imply that the phosphor without co-doping Dy3+ has no long afterglow properties.
When the doping concentration of Eu2+ is 0.01mol, the long afterglow is the best in three experimental samples with different Eu2+ contents.
The luminescent properties will decrease while increasing the doping concentration of Eu2+ due to the concentration quenching.

Key words: phosphor, emission spectra, long afterglow

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