Abstract

The aim of this study is to prepare nanoparticles molybdates doped with rare earth ion $ Eu^{3+} $ synthesized by sol-gel method to study the luminescence property of these crystal powders. The influence of pH and doping amount of $ Eu^{3+} $ on these nanoparticles was also investigated. The results showed that $ CaMoO_4: Eu^{3+} $ (6%, mass ratio) prepared in pH value 7-9 and calcined at 700°C became uniformly cubic crystal and exhibited red photoluminescence with strongest emission peak at 612×258 nm excitation, which was caused by $ ^5D_0→^7F_2 $ transition of $ Eu^{3+}$. It can be predicted this $ CaMoO_4: Eu^{3+} $ phosphor could be a potential phosphor material for white- light LED application in the future.

Keywords:

Luminescence property, molybdate, phosphor, sol-gel method,

References

1. Li, H.B., 2010. Study on luminescent properties of the red phosphor NaEu (MoO4)2 prepared via sol-gel process [J]. Liaoning Chem. Ind., 39(10): 1010-1013.
   
2. Liu, J., H.Z. Lian and C.S. Shi, 2007. Improved optical photoluminescence by charge compensation in the phosphor system CaMoO4: Eu3+ [J]. Opt. Mater., 29(12): 1591-1594.
   CrossRef    Direct Link
3. Shi, W.J., X.Y. Zhang, C.Y. Li et al., 2012. Synthesis and luminescent properties of NaAlSiO4: Eu3+ phosphors using coal fly ash as starting materials [J]. J. Chinese Rare Earth Soc., 30(3): 315-319.
   Direct Link
4. Wang, X., J. Zhuang, Q. Peng and Y.D. Li, 2006. Hydrothermal synthesis of rare-earth fluoride nanocrystals [J]. Inorg. Chem., 45(17): 6661-6667.
   CrossRef    PMid:16903720    Direct Link
5. Wei, X.W., J. Xu, X.J. Song, Y.H. Ni, P. Zhang, C.J. Xia, G.C. Zhao and Z.S. Yang, 2006. Multi-walled carbon nanotubes coated with rare earth fluoride EuF3 and TbF3 nanoparticles [J]. Mater. Res. Bull., 41: 92-99.
   CrossRefhttp://dx.doi.org/10.1016/j.materresbull.2005.07.029    Direct Link
6. Xu, X.D., G.Z. Xu, Z.C. Wu, Z.L. Wang and M.L. Gong, 2007. Research progress on phosphors for white light-emitting diodes [J]. Acta Sci. Naturalium Univ., Sunyatseni, 46(5): 124-128.
   Direct Link

Competing interests

The authors have no competing interests.

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