Energy transfer from Ce^(3+) to Tb^(3+), Dy^(3+)and Eu^(3+) in Na_3Y(BO_3)_2  

作　　者：曾洪伟 由芳田 彭洪尚 黄世华 

机构地区：[1]Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University

出　　处：《Journal of Rare Earths》2015年第10期1051-1055,共5页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(11274038)

摘　　要：Energy transfer is a promising strategy to improve the visible light emitting efficiency of phosphors. A series of Ce3＋, Tb3＋, Dy3＋ and/or EU3＋ doped Na3Y（BO3）2 （NYB） were prepared by solid-state reaction and their photoluminescence properties were studied in detail. The excitation and emission spectra of NYB：Ce3＋,Tb3＋ and NYB：Ce3＋,Dy3＋ revealed that an efficient energy transfer process from Ce3＋ to Zb3＋ or Dy3＋ occurred upon excitation Ce3＋ into 5d level. The dependence of the decay times of Ce3＋ 5d level on Tb3＋ or Dy3＋ concentration indicated that the energy transfer efficiency increased with increasing Tb3＋ or Dy3＋ content. So the UV excitation light could be converted into green or near-white emission. However, there was no obvious evidence of the existence of energy transfer from Ce3＋ to Eu3＋ in NYB.Energy transfer is a promising strategy to improve the visible light emitting efficiency of phosphors. A series of Ce3＋, Tb3＋, Dy3＋ and/or EU3＋ doped Na3Y（BO3）2 （NYB） were prepared by solid-state reaction and their photoluminescence properties were studied in detail. The excitation and emission spectra of NYB：Ce3＋,Tb3＋ and NYB：Ce3＋,Dy3＋ revealed that an efficient energy transfer process from Ce3＋ to Zb3＋ or Dy3＋ occurred upon excitation Ce3＋ into 5d level. The dependence of the decay times of Ce3＋ 5d level on Tb3＋ or Dy3＋ concentration indicated that the energy transfer efficiency increased with increasing Tb3＋ or Dy3＋ content. So the UV excitation light could be converted into green or near-white emission. However, there was no obvious evidence of the existence of energy transfer from Ce3＋ to Eu3＋ in NYB.

关 键 词：lanthanide ions energy transfer Na3Y（BO3）2 visible light emitting Ce3＋ rare earths 

分 类 号：TQ422[化学工程]