Energy transfer and luminescent properties of Pr3+ and/or Dy3+ doped NaYF4 and NaGdF4
来源期刊：JOURNAL OF RARE EARTHS2013年第12期
论文作者：由芳田 张新国 彭洪尚 黄世华 黄艳 陶冶
文章页码：1125 - 1129
摘 要：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 transfer 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+.
由芳田1，张新国1,2，彭洪尚1，黄世华1，黄艳3，陶冶3
1. Key Laboratory of Luminescence and Optical Information,Ministry of Education,Institute of Optoelectronic Technology,Beijing Jiaotong University2. Zhengzhou Institute of Aeronautical Industry Management3. Beijing Synchrotron Radiation Laboratory,Institute of High Energy Physics
摘 要：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 transfer 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+.
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