Eu2+、Dy3+、Li+共掺杂CaSi2O2N2荧光粉的发光性能

doi:10.3724/SP.J.1077.2012.11775

无机材料学报 ›› 2012, Vol. 27 ›› Issue (10): 1095-1098.DOI: 10.3724/SP.J.1077.2012.11775 CSTR: 32189.14.SP.J.1077.2012.11775

Eu²⁺、Dy³⁺、Li⁺共掺杂CaSi₂O₂N₂荧光粉的发光性能

卢亚军, 王宏志, 李耀刚, 张青红

(东华大学材料学院, 纤维材料改性国家重点实验室, 上海 201620)

收稿日期:2011-12-12 修回日期:2012-02-11 出版日期:2012-10-20 网络出版日期:2012-09-17
作者简介:卢亚军(1987-), 女, 硕士研究生. E-mail: luyajun11@163.com
基金资助:
国家自然科学基金(51072034, 51172042); 教育部科技创新工程重大项目培育资助项目(708039)

Photoluminescence Properties of Eu²⁺, Dy³⁺, Li⁺ Co-doped CaSi₂O₂N₂ Phosphors

LU Ya-Jun, WANG Hong-Zhi, LI Yao-Gang, ZHANG Qing-Hong

(College of Materials Science and Engineering, Donghua University, Shanghai 201620, China)

Received:2011-12-12 Revised:2012-02-11 Published:2012-10-20 Online:2012-09-17
About author:LU Ya-Jun. E-mail: luyajun11@163.com
Supported by:
National Natural Science Foundation of China (51072034, 51172042); Cultivation Fund of the Key Scientific and Technical Innovation Project (708039)

摘要/Abstract

摘要： 采用高温固相反应法制备了一系列白光LED用CaSi₂O₂N₂: 0.05Eu²⁺, xDy³⁺, xLi⁺(0≤x≤0.03)荧光粉. 利用X射线衍射仪对样品的物相结构进行了分析, 结果表明: Dy³⁺和Li⁺离子的掺入没有改变CaSi₂O₂N₂: Eu²⁺荧光粉的主晶相. 利用荧光光谱仪对样品的发光性能进行了测试, 发现所有样品的激发光谱均覆盖了从近紫外到蓝光的较宽范围, 400 nm激发下得到的发射光谱为宽波段的单峰, 峰值位于545 nm左右, 是Eu²⁺离子5d-4f电子跃迁引起的. Dy³⁺离子掺杂可以提高CaSi₂O₂N₂:Eu²⁺荧光粉的发光强度, Dy³⁺与Li⁺共掺杂可进一步提高荧光粉的发光强度, 当Dy³⁺和Li⁺的掺杂量为1mol%时, 荧光粉的发光强度达到最大值, 是单掺杂Eu²⁺的荧光粉发光强度的157%.

关键词: 荧光粉, 共掺杂, 发光性能, 白光发光二极管

Abstract: A series of CaSi₂O₂N₂: 0.05Eu²⁺, xDy³⁺, xLi+ (0≤x≤0.03) phosphors were prepared through high-temperature solid-state reaction method. The phosphors were characterized by X-ray diffraciton (XRD) and fluorescence spectrophotometer (PL). XRD patterns revealed that the samples maintained CaSi₂O₂N₂ single phase after doping Dy³⁺ or Li⁺ ions. The PL results showed that the excitation spectra of samples were all located in the UV to blue spectral region. The emission spectra for 400 nm excitation showed the typical broad band of Eu²⁺ peaking at about 545 nm (5d-4f). In addition, the emission intensity could be greatly enhanced through doping Dy³⁺ in CaSi₂O₂N₂:Eu²⁺ phosphors. Furthermore, the effect of the Li⁺ doping was studied. Li⁺ ions could be used as charge compensation in CaSi₂O₂N₂:Eu²⁺, Dy³⁺ phosphors. Thus the doping of Li+ ions could further improve the emission intensity of CaSi₂O₂N₂:Eu²⁺, Dy³⁺ phosphor. When the doping concentrations of Dy³⁺ and Li+ were 1mol%, the emission intensity reached a maximum, which was about 157% of that of the sample without doping Dy³⁺ or Li+.

Key words: phosphors, co-doping, luminescence, LED

中图分类号:

O482

卢亚军, 王宏志, 李耀刚, 张青红. Eu²⁺、Dy³⁺、Li⁺共掺杂CaSi₂O₂N₂荧光粉的发光性能[J]. 无机材料学报, 2012, 27(10): 1095-1098.

LU Ya-Jun, WANG Hong-Zhi, LI Yao-Gang, ZHANG Qing-Hong. Photoluminescence Properties of Eu²⁺, Dy³⁺, Li⁺ Co-doped CaSi₂O₂N₂ Phosphors[J]. Journal of Inorganic Materials, 2012, 27(10): 1095-1098.

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Eu²⁺、Dy³⁺、Li⁺共掺杂CaSi₂O₂N₂荧光粉的发光性能

Photoluminescence Properties of Eu²⁺, Dy³⁺, Li⁺ Co-doped CaSi₂O₂N₂ Phosphors

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