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CaYAlO4∶Ce3+,Tb3+荧光粉的发光性能及Ce3+→Tb3+的能量传递

Luminescence Properties and Ce3+→Tb3+ Energy Transfer in CaYAlO4∶Ce3+,Tb3+ Phosphors

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摘要

采用溶胶凝胶法合成了CaY1-x-yAlO4∶xCe3+, yTb3+荧光粉, 探讨了稀土离子Ce3+、Tb3+单掺及共掺对样品发光性能的影响。研究结果表明, 合成的样品为四方晶系的纯相。在368 nm光激发下, CaY1-xAlO4∶xCe3+发射蓝光, 发射峰位于445 nm附近; 在246 nm光激发下, CaY1-yAlO4∶yTb3+发射绿光, 发射峰位于418, 440, 491, 548, 589, 625 nm附近。在Ce3+/Tb3+共掺荧光粉中, Ce3+的能量可传递给Tb3+, 使Tb3+的发光增强; 当用368 nm或378 nm光激发共掺荧光粉时, Tb3+呈现强烈的绿光发射。调整Ce3+与Tb3+的掺杂浓度可以调整对应的蓝光与绿光的发射强度。

Abstract

CaY1-x-yAlO4∶xCe3+, yTb3+ phosphors are synthesized by the sol-gel method. The effects of single-doped Ce3+ or Tb3+ rare earth ions and their co-doping on the luminescence properties of the phosphors are discussed. The results show that the synthesized phosphors are pure samples with the tetragonal structure. The CaY1-xAlO4∶xCe3+ phosphors emit blue light peaking at around 445 nm under an excitation wavelength of 368 nm. The CaY1-yAlO4∶yTb3+ phosphors emit green light peaking at 418, 440, 491, 548, 589, and 625 nm under an excitation wavelength of 246 nm. In Ce3+/Tb3+ co-doped phosphors, the energy transfers from Ce3+ to Tb3+, which makes the luminescence of Tb3+ enhanced. When the Ce3+ and Tb3+ co-doped phosphors are under an excitation wavelength of 368 nm or 378 nm, Tb3+ emits a strong green light. The intensities of blue and green lights can be tuned by adjusting the doping concentrations of Ce3+ and Tb3+.

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中图分类号:O482.31;O614.33

DOI:10.3788/AOS201838.0116002

所属栏目:材料

基金项目:国家自然科学基金(21161004)

收稿日期:2017-06-19

修改稿日期:2017-09-10

网络出版日期:--

作者单位    点击查看

陈彩花:广西师范学院化学与材料科学学院, 广西 南宁 530001
陈凯:广西师范学院化学与材料科学学院, 广西 南宁 530001
蒙丽丽:广西师范学院化学与材料科学学院, 广西 南宁 530001
张丽霞:广西师范学院化学与材料科学学院, 广西 南宁 530001
梁利芳:广西师范学院化学与材料科学学院, 广西 南宁 530001

联系人作者:梁利芳(13607811964@163.com)

备注:陈彩花(1989-), 女, 硕士研究生, 主要从事发光材料方面的研究。E-mail: 847716059@qq.com

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