Journal of Applied Spectroscopy

, Volume 81, Issue 5, pp 885–892 | Cite as

Synthesis of La2(1–x)(MoO4)3:RE2x (RE = Eu, Tb) Phosphor Powders via a Sol-Gel Combustion Process and Their Photoluminescent Properties

English-Language Articles

Powder phosphors of La2(1–x)(MoO4)3:RE2x , RE = Eu3+ or Tb3+, were prepared by sol-gel combustion reactions with calcination temperatures of 600–900°C. Their reaction process, crystal structures, morphologies, and optical properties were characterized by differential scanning calorimetry, powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and photoluminescence spectroscopy, respectively. Our results reveal that all of these phosphors adopted the tetragonal crystal structure. The obtained La2(1–x) (MoO4)3:Eu2x phosphors exhibit a notable emission in the red light range which can be assigned to the 5D07F2 transition of Eu3+ upon excitation at 459 nm. When the phosphors were irradiated by 277 nm light, they showed predominant green emission (5D47F5) at 540 nm. The highest emission of the phosphors can be achieved by adjusting the doping concentration of Eu3+ at x =0.25 or Tb3+ at x =0.09.


photoluminescence phosphor sol-gel combustion rare earth molybdates 


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringSoutheast UniversityNanjingP. R. China

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