摘要
采用固相法合成了SrAl2B2O7:Eu3+系列荧光粉,研究了它们在紫外和真空紫外激发下的发光性能。紫外激发下,SrAl2B2O7:Eu3+的最强发射峰位于610nm附近,具有较高的发射强度和较好的色纯度,但是在真空紫外激发下,其发光强度却比较弱。通过分析SrAl2B2O7:Eu3+的激发光谱与基质晶体的电子结构计算结果,对该现象进行了解释。第一原理的模拟计算表明,Ba2+的掺杂可以使SrAl2B2O7的带隙变宽,由此推论Ba2+的掺杂可以提高SrAl2B2O7:Eu3+样品在真空紫外激发下的发光强度。本研究的实验结果也证实了这一推论。
The phosphor SrAl2B2OT：Eu was synthesized successfully by solid-state reaction. Their photoluminescence properties were studied under ultraviolet （UV） and vacuum ultraviolet （VUV） excitation. The strong red emission at 610 nm was observed under UV excitation, while the luminescence of SrAl2B2O7： Eu^3＋ under VUV excitation was very weak. This phenomenon was evaluated by the combination of the exci-tation spectrum of SrAl2B2O7： Eu^3＋ and electronic structure calculation of the host lattice, and a possible explanation was proposed. The results of the first principle calculation indicated that a wider band gap could be obtained by the codoping of Ba^2＋. And we concluded that the luminescence of SrAlEB2O7：Eu^3＋ under UV excitation would be improved. The experimental results approved our deduction.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2009年第3期384-389,共6页
Journal of the Chinese Society of Rare Earths
基金
广州有色金属研究院青年科研基金项目
广东省稀土发光材料重点科研基地(2008A060303001)
高清晰度大屏显示器用稀土发光材料研究(2008A010500004)资助项目
