稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2013年
12期
1125-1129
,共5页
由芳田%张新国%彭洪尚%黄世华%黄艳%陶冶
由芳田%張新國%彭洪尚%黃世華%黃豔%陶冶
유방전%장신국%팽홍상%황세화%황염%도야
energy transfer%rare earth ions%vacuum ultraviolet (VUV)%4f5d absorption
The phosphors that are able to convert vacuum ultraviolet (VUV) light into visible light are demanded for the development of novel displaying and lighting devices. NaYF4:Pr3+,Dy3+, NaGdF4:Pr3+, NaGdF4:Dy3+ and NaGdF4:Pr3+,Dy3+ were prepared by hydrothermal synthesis method and their luminescent properties in VUV-vis spectral region were investigated at room temperature. For NaYF4:Pr3+,Dy3+, no energy transfer process from Pr3+to Dy3+was observed. However, the introduction of Gd3+into the fluoride lattice led to intense Dy3+emissions upon Pr3+4f5d state excitation. Gd3+acted as an intermediate, resulting in efficient energy trans-fer from Pr3+to Dy3+in NaGdF4. Pr3+transferred most of its energy to Gd3+, and then the energy was transferred from Gd3+to Dy3+. So NaGdF4:Pr3+,Dy3+not only took full advantage of the intense Pr3+4f5d absorption, but converted the VUV excitation light into the near-white emission of Dy3+.
