YAG：Ce体系中稀土离子掺杂对Ce^3＋的光谱性能的影响  

Effects of Doping Lanthanide Ions in YAG∶Ce System on the Spectral Properties of Ce^(3+)

作　　者：孔丽[1] 甘树才[1] 洪广言[2] 尤洪鹏[2] 张吉林[2] 

机构地区：[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

出　　处：《高等学校化学学报》2008年第4期673-676,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20071031)资助

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.（Y0.95Ln0.01 Ce0.04 ） 3Al5O12 phosphors were synthesized by high on the luminescence properties of der reducing atmosphere and the doping effects of lanthanide ions Ln^3＋ phosphors were studied. YAG： Ce ,Ln spectra of excitation and emission show that the influence between Ce^3＋ and Ln^3＋ can be divided into the following three types： （1） The Ce^3＋ emission intensities are decreased slightly in the YAG： Ce doped with La^3＋ , Gd^3＋ and Lu^3＋ , respectively. （2） Because of the energy transfer and competitive absorption,for Pr^3＋ Sm^3＋ Tb^3＋,Dy^3＋ , Ho^3＋,Er^3＋, Tm^3＋ co-doped YAG： Ce, the Ce^3＋ emission intensities are observably decreased. In the YAG＂ Ce,Pr system, the emission of Pr^3＋ is at 609 nm; and in the YAG＂ Ce,Sm system, the emission of Sm^3＋ is at 616 nm. So it can increase the color rendering in- dex（CRI） of YAG： Ce doped with Pr^3＋ or Sm^3＋ （3） It was found that doping with Eu^3＋ , Yb^3＋ and Nd^3＋ in YAG： Ce the Ce^3＋ emission intensities quenched strongly.

关 键 词：YAG:Ce 白光LED LN^3+ 光致发光 

分 类 号：O614.33[理学—无机化学]