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Abstract
Eu3+-doped CaMoO4 phosphors with a Scheelite structure have been synthesized via mechanochemically assisted solid state etathesis
reaction at room temperature. The characteristics of the phosphor materials were analyzed by X-ray diffraction, Fourier transform
infrared spectroscopy, photoluminescence and diffuse reflectance spectra. The photoluminescence emission spectra of CaMoO4:Eu3+
phosphors showed an intense peak at 615 nm which corresponds to 5D0→7F2 transition of Eu3+. Comparing with the earlier reports, it is concluded that Eu3+ occupied a lattice site with non-centrosymmetric environment in the scheelite phase. The excitation spectra displayed that these phosphors could be effectively excited by near ultraviolet (394 nm) light and so they could be used as red components for white light-emitting diodes.
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Copyright (c) 2016 A. John Peter
This work is licensed under a Creative Commons Attribution 4.0 International License.
References
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References
J.K. Park, C.H. Kim, S.H. Park, H.D. Park and S.Y. Choi, Appl. Phys. Lett., 84, 1647 (2004); https://doi.org/10.1063/1.1667620.
S. Neeraj, N. Kijima and A.K. Cheetham, Chem. Phys. Lett., 387, 2 (2004); https://doi.org/10.1016/j.cplett.2003.12.130.
P. Parhi, S.S. Singh, A.R. Ray and A. Ramanan, Bull. Mater. Sci., 29, 115 (2006); https://doi.org/10.1007/BF02704602.
K. Nakamoto, Infrared and Raman Spectra of Inorganic and Coord-ination Compounds, Wiley, New York, edn 4 (1986) .
A. Kato, S. Oishi, T. Shishido, M. Yamazaki and S. Iida, J. Phys. Chem. Solids, 66, 2079 (2005); https://doi.org/10.1016/j.jpcs.2005.09.058.
C.H. Chiu, C.H. Liu, S.B. Huang and T.M. Chen, J. Electrochem. Soc., 154, 181 (2007); https://doi.org/10.1149/1.2731042.
C.J. Kim and M.S. Kwon, Electron. Mater. Lett., 5, 113 (2009) https://doi.org/10.3365/eml.2009.09.113.