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Potential visible light emitting rare-earth activated Ca0.5Y1−x(MoO4)2:xRE3+ (RE = Pr, Sm, Eu, Tb, Dy) phosphors for solid state lighting applications

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An Erratum to this article was published on 02 April 2015

Abstract

Scheelite type Ca0.5Y(1−x)(MoO4)2:xRE3+ (RE = Pr, Sm, Eu, Tb, Dy) phosphors were successfully synthesized by the conventional solid-state reaction method. The as prepared phosphors were characterized by means of X-ray diffraction, scanning electron microscopy and photoluminescence. The results reveal that the obtained powder phosphors possess scheelite structure with tetragonal symmetry with a space group of I41/a. The photoluminescence excitation and emission spectra of Ca0.5Y(1−x)(MoO4)2:xRE3+ (RE = Pr, Sm, Eu, Tb, Dy) microstructures were investigated in detail. Upon UV or blue excitation, Ca0.5Y(1−x)(MoO4)2:xRE3+ (RE = Pr, Sm, Eu, Tb, Dy) show bright red, orange, red, green and yellow emissions respectively. To confirm the color richness, color chromaticity coordinates of RE3+ doped Ca0.5Y(1−x)(MoO4)2 microstructures were estimated. In addition to that, it is observed that there is an enhanced luminescence red emission is achieved by means of adding the alkali chloride to the Ca0.5Y(1−x)(MoO4)2:Pr3+ phosphor. The results suggest that the obtained powder phosphors are promising phosphor candidates for solid state lighting applications.

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Acknowledgments

The authors are grateful to the Science and Engineering Research Board—SERB, New Delhi for funding this work under the SERB Project SR/FTP/PS-135/2011.

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Authors and Affiliations

  1. Department of Physics, B.S.Abdur Rahman University, Vandalur, Chennai, Tamilnadu, India

    V. Mahalingam, J. Thirumalai & R. Krishnan

  2. Department of Physics, Sree Sevugan Annamalai College, Devakottai, Tamilnadu, India

    R. Chandramohan

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  1. V. Mahalingam
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  2. J. Thirumalai
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  3. R. Krishnan
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  4. R. Chandramohan
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Correspondence to J. Thirumalai.

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Mahalingam, V., Thirumalai, J., Krishnan, R. et al. Potential visible light emitting rare-earth activated Ca0.5Y1−x(MoO4)2:xRE3+ (RE = Pr, Sm, Eu, Tb, Dy) phosphors for solid state lighting applications. J Mater Sci: Mater Electron 26, 842–852 (2015). https://doi.org/10.1007/s10854-014-2473-2

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  • DOI: https://doi.org/10.1007/s10854-014-2473-2

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