Influence of morphology on luminescence properties of xenotime-type phosphors NaYP2O7:Eu3+ synthesized via solid state and citrate-gel routes

  • T. S. Sreena
  • P. Prabhakar Rao
  • K. N. Ajmal
  • Athira K. V. Raj


A series of Eu3+ activated xenotime type rare earth phosphate NaYP2O7 based orange–red emitting phosphors have been prepared via solid state (SS) and citrate gel (CG) methods. The morphological variation of the developed phosphors concerning synthesis method and heat treatment has significantly influenced the luminescence properties. The phosphors synthesized by the CG route reveals the formation of homogeneous powder with small particles along with uniform size. The developed phosphors exhibit intense orange–red emission under 394 nm near UV excitation with a full width half maximum ~ 2 nm. Compared with the phosphors synthesized by SS route, the phosphors obtained by CG method possess enhanced and sharper orange–red emission with longer lifetimes due to the 5D07F1–2 transitions. The developed narrow red emitting phosphors have better emission intensity in comparison with commercially available Y2O3:Eu3+ red phosphors. Thus, these phosphors could be a suitable candidate for solid state lighting applications for the fabrication of white light emitting diodes.



One of the authors, T. S. Sreena would like to acknowledge Department of Science and Technology (DST) INSPIRE Programme, Council of Scientific and Industrial Research (CSIR), Govt. of India for the research facilities and financial support.


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • T. S. Sreena
    • 1
  • P. Prabhakar Rao
    • 1
  • K. N. Ajmal
    • 1
  • Athira K. V. Raj
    • 1
  1. 1.Materials Science and Technology DivisionCSIR-National Institute for Interdisciplinary Science and Technology (NIIST)TrivandrumIndia

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