高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

YAG∶Ce体系中稀土离子掺杂对Ce3+的光谱性能的影响

孔丽1, 甘树才1, 洪广言2, 尤洪鹏2, 张吉林2   

    1. 吉林大学化学学院, 长春 130023;
    2. 中国科学院长春应用化学研究所, 稀土资源利用国家重点实验室, 长春 130022
  • 收稿日期:2007-09-24 修回日期:1900-01-01 出版日期:2008-04-10 发布日期:2008-04-10
  • 通讯作者: 洪广言

Effects of Doping Lanthanide Ions in YAG∶Ce System on the Spectral Properties of Ce3+

KONG Li1, GAN Shu-Cai1, HONG Guang-Yan2*, YOU Hong-Peng2, ZHANG Ji-Lin2   

    1. College of Chemistry, Jilin University, Changchun 130023, China;
    2. State Key Laboratory of Rare Earth Resources and Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2007-09-24 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10
  • Contact: HONG Guang-Yan

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摘要： 采用高温固相法合成了一系列的(Y0.95Ln0.01Ce0.04)3Al5O12(简称YAG∶Ce,Ln), 系统地研究了此体系中的Ln3+对Ce3+的发光强度的影响. 结果表明, 在YAG∶Ce的体系中, La3+, Gd3+, Lu3+等光学透明离子的少量掺杂对Ce3+的发光强度的影响不大; 掺入少量的Pr3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+等稀土离子, 由于它们的能级与Ce3+的能级有交叠, 使它们之间存在着竞争吸收或能量转移, 对Ce3+的发光有较明显的变化, 其中, Pr3+和Sm3+的掺入使其在红光区有发射峰, 可以增加YAG∶Ce的红色成分以提高显色性; Nd3+, Eu3+和Yb3+对Ce3+的发光有严重的猝灭作用.

关键词: YAG∶Ce, 白光LED, Ln3+, 光致发光

Abstract: (Y0.95Ln0.01Ce0.04)3Al5O12 phosphors were synthesized by high-temperature solid state reaction under reducing atmosphere and the doping effects of lanthanide ions(Ln3+) on the luminescence properties of phosphors were studied. YAG∶Ce,Ln spectra of excitation and emission show that the influence between Ce3+ and Ln3+ can be divided into the following three types: (1) The Ce3+ emission intensities are decreased slightly in the YAG∶Ce doped with La3+, Gd3+ and Lu3+, respectively. (2) Because of the energy transfer and competitive absorption, for Pr3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+ co-doped YAG∶Ce, the Ce3+ emission intensities are observably decreased. In the YAG∶Ce,Pr system, the emission of Pr3+ is at 609 nm; and in the YAG∶Ce,Sm system, the emission of Sm3+ is at 616 nm. So it can increase the color rendering index(CRI) of YAG∶Ce doped with Pr3+ or Sm3+. (3) It was found that doping with Eu3+, Yb3+ and Nd3+in YAG∶Ce the Ce3+ emission intensities quenched strongly.

Key words: YAG∶Ce, white-LED, Ln3+, photoluminescence

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