d-f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

K. A. GEDEKAR; S. P. WANKHEDE; S. V. MOHARIL; R. M. BELEKAR

doi:10.1007/s40145-017-0246-0

Journal of Advanced Ceramics 2017, 6(4): 341-350 https://doi.org/10.1007/s40145-017-0246-0

Research Article |

Open Access | Issue | Published: 04 November 2017

d-f luminescence of Ce³⁺ and Eu²⁺ ions in BaAl₂O₄, SrAl₂O₄ and CaAl₂O₄ phosphors

Show Author's Information Hide Author's Information K. A. GEDEKAR^{^a}(

), S. P. WANKHEDE^{^a}, S. V. MOHARIL^{^b}, R. M. BELEKAR^{^c}

a Department of Physics, K.D.K. College of Engineering, Nagpur 440009, India

b Department of Physics, Nagpur University, Nagpur 440010, India

c Department of Physics and Electronics, Government Vidarbha Institute of Science and Humanities, Amravati 444604, India

Keywords:

photoluminescence, crystal structure, X-ray diffraction (XRD), Ce³⁺, Eu²⁺

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GEDEKAR KA, WANKHEDE SP, MOHARIL SV, et al. d-f luminescence of Ce³⁺ and Eu²⁺ ions in BaAl₂O₄, SrAl₂O₄ and CaAl₂O₄ phosphors. Journal of Advanced Ceramics, 2017, 6(4): 341-350. https://doi.org/10.1007/s40145-017-0246-0

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Abstract

Ce³⁺ and Eu²⁺ doped alkaline earth aluminates MAl₂O₄ (M = Ca, Sr, Ba) were prepared by single-step combustion synthesis at low temperature (600 ℃). X-ray diffraction (XRD) analysis confirmed the formation of BaAl₂O₄, CaAl₂O₄, and SrAl₂O₄. Photoluminescence spectra and optimal luminescent properties of Ce³⁺ and Eu²⁺ doped MAl₂O₄ phosphors were studied. Relation between Eu²⁺ and Ce³⁺ f-d transitions was explained. Spectroscopic properties known for Ce³⁺ were used to predict those of Eu²⁺ by using Dorenbos’ method. The values thus calculated were in excellent agreement with the experimental results. The preferential substitution of Ce³⁺ and Eu²⁺ at different Ba²⁺, Sr²⁺, Ca²⁺ crystallographic sites was discussed. The dependence of emission wavelengths of Ce³⁺ and Eu²⁺ on local symmetry of different crystallographic sites was also studied by using Van Uitert’s empirical relation. Experimental results matched excellently with the predictions of Dorenbos’ and Van Uitert’s models.

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d-f luminescence of Ce³⁺ and Eu²⁺ ions in BaAl₂O₄, SrAl₂O₄ and CaAl₂O₄ phosphors

Show Author's information Hide Author's Information K. A. GEDEKAR^{^a}(

), S. P. WANKHEDE^{^a}, S. V. MOHARIL^{^b}, R. M. BELEKAR^{^c}

a Department of Physics, K.D.K. College of Engineering, Nagpur 440009, India

b Department of Physics, Nagpur University, Nagpur 440010, India

c Department of Physics and Electronics, Government Vidarbha Institute of Science and Humanities, Amravati 444604, India

Abstract

Keywords: photoluminescence, crystal structure, X-ray diffraction (XRD), Ce³⁺, Eu²⁺

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Publication history

Received: 30 June 2017

Revised: 06 September 2017

Accepted: 08 September 2017

Published: 04 November 2017

Issue date: December 2017

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Acknowledgements

We are thankful to the management of K.D.K College of Engineering, Nagpur, India, for providing necessary assistance.

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