Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+ |
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Authors: | L Jiang S Xiao X Yang J Ding K Dong |
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Affiliation: | 1. Institute for Nanophysics and Rare-Earth Luminescence, Xiangtan University, Xiangtan, 411105, Hunan, China
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Abstract: | Yb3+/Er3+ co-doped Zn2SiO4 ceramics are rapidly synthesized by the microwave radiation method. Green and red up-conversion emissions are observed in Zn2SiO4: Yb3+, Er3+ ceramics under 980 nm excitation. The influence of co-doped Li+ or Bi3+ ion on luminescence intensity for the phosphors has been investigated. At Li+ or Bi3+ doping concentration of 1 mol%, up-converted green emission can be increased by 6 times and 20 times, respectively. It is believed that co-doped Li+ or Bi3+ ion results in the local distortion of Er3+ in Zn2SiO4, increasing the intra-4f transitions of Er3+ ions. The local distortion is proved by spectral probing method with Eu3+. |
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