Combustion Synthesis and Luminescent Properties of Red-Emitting Sr4-x Al6MoO16:xEu3+ Phosphors

Authors

  • B. V. Tupte  Department of Physics, SGM College Kurkheda, Maharashtra ,India
  • M. M. Bhave  Department of Physics, N. H. College, Bramhapuri, Maharashtra ,India
  • C. D. Mungmode  Department of Physics, M.G. College, Armori, Maharashtra ,India
  • D. H. Gahane  Department of Physics, N. H. College, Bramhapuri, Maharashtra ,India
  • S. V. Moharil  Ex-Head Department Of Physics RTM Nagpur University, Nagpur, Maharashtra ,India

Keywords:

Phosphors; Combustion Method; Sr4-x Al6 MoO16 :xEu3+ ;Luminescence

Abstract

In the present work, Sr4-x Al6MoO16:xEu3+(x= 2,3,4 &5 %) red-emitting phosphors have been successfully synthesized by the combustion method and their photoluminescence characterization was performed. Photoluminescence spectra showed that the emission peaks at 593 (5D0→7F1) and 615 nm (5D0→7F2) for Eu3+ are observed after excitation at 270 nm (i.e. Mo–O charge transfer band). Intense red emission of Eu3+ in Sr4-xAl6MoO16 host lattice show the occupation of a non-centrosymmetric site by the rare earth ions in the host lattice. The emission intensity of Eu3+ ions in the Sr4-xAl6MoO16 host largely enhanced with the concentration increasing of activator (Eu3+). Intense characteristic emissions show no concentration quenching up to 3 mol% concentration of rare earth ion and the emission intensity reached the maximum at x=4%. Among these phosphors, Sr4-x Al6MoO16:xEu3+ synthesized at 750℃ exhibits the strongest red emission and appropriate CIE chromaticity coordinates (x=0.637, y=0.359) close to the NTSC standard value. It is shown that Sr4-xAl6MoO16:xEu3+ phosphors are demonstrating their potential suitability for application in solid state lighting.

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International Journal of Scientific Research in Science and Technology

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Published

2018-01-30

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Volume 4, Issue 1, January-February-2018

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Research Articles

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[1]
B. V. Tupte, M. M. Bhave, C. D. Mungmode, D. H. Gahane, S. V. Moharil "Combustion Synthesis and Luminescent Properties of Red-Emitting Sr4-x Al6MoO16:xEu3+ Phosphors" International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011,Volume 4, Issue 1, pp.319-323, January-February-2018.