稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
Journal of Rare Earths
2015年
10期
1051-1055
,共5页
曾洪伟%由芳田%彭洪尚%黄世华
曾洪偉%由芳田%彭洪尚%黃世華
증홍위%유방전%팽홍상%황세화
lanthanide ions%energy transfer%Na3Y(BO3)2%visible light emitting%Ce3+%rare earths
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 stud-ied 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 Tb3+ 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 ex-citation light could be converted into green or near-white emission. However, there was no obvious evidence of the existence of en-ergy transfer from Ce3+ to Eu3+ in NYB.
