Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+

• DOI: 10.1007/s00340-012-4986-9
• Publication Date: 2012-04-19T13:08:11Z
• Authors: L. Jiang; S. Xiao; X. Yang; J. Ding; K. Dong
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

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+.