首页|Enhanced bright green luminescence from GdOF:Ho3+up-conversion phosphor via Yb3+doping
Enhanced bright green luminescence from GdOF:Ho3+up-conversion phosphor via Yb3+doping
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In this paper,a series of GdOF-based green phosphors doped with Ho3+and Yb3+ions was prepared by a simple co-precipitation method.The crystal structures and optical properties were investigated in detail.The intensity of the emission of GdOF:Yb3+,Ho3+phosphors is enhanced by the effective energy transfer from Yb3+to Ho3+,and the optimal luminescence is achieved with the Ho3+doping amount of 0.1 mol％as well as Yb3+doping amount of 5 mol％.Tunable UC emission of samples is achieved by adjusting the doping concentration of Ho3+or Yb3+.The purity of the green UC emission is further improved by enhancing the excitation pumping power.In addition,logarithmic functions of green,red and near-infrared radiation intensities were calculated versus logarithmic function of pump power for further study.A possible UC luminescence mechanism between Yb3+and Ho3+is discussed based on power-dependent UC luminescence spectrum and decay lifetimes.These results suggest that GdOF∶Yb3+,Ho3+phosphors with bright and high-purity green UC emission have potential applications in the fields of bioimaging,display and illumination.
Up-conversionGdOFLanthanide ionsRare earths
Linjun Qin、Yue Guo、Jing Xu、Lixi Wang、Qitu Zhang
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College of Materials Science and Engineering,Nanjing Tech University,Nanjing,211816,China
National Natural Science Foundation of ChinaPriority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
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