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Rapid synthesis and enhancement in down conversion emission properties of BaAl2O4:Eu2+,RE3+ (RE3+=Y, Pr) nanophosphors

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Abstract

BaAl2O4:Eu2+,RE3+ (RE3+=Y, Pr) down conversion nanophosphors were prepared at 600 °C by a rapid gel combustion technique in presence of air using boron as flux and urea as a fuel. A comparative study of the prepared materials was carried out with and without the addition of boric acid. The boric acid was playing the important role of flux and reducer simultaneously. The peaks available in the XPS spectra of BaAl2O4:Eu2+ at 1126.5 and 1154.8 eV was ascribed to Eu2+(3d 5/2) and Eu2+(3d 3/2) respectively which confirmed the presence of Eu2+ ion in the prepared lattice. Morphology of phosphors was characterized by tunneling electron microscopy. XRD patterns revealed a dominant phase characteristics of hexagonal BaAl2O4 compound and the presence of dopants having unrecognizable effects on basic crystal structure of BaAl2O4. The addition of boric acid showed a remarkable change in luminescence properties and crystal size of nanophosphors. The emission spectra of phosphors had a broad band with maximum at 490–495 nm due to electron transition from 4f 65d 1 → 4f 7 of Eu2+ ion. The codoping of the rare earth (RE3+=Y, Pr) ions help in the enhancement of their luminescent properties. The prepared phosphors had brilliant optoelectronic properties that can be properly used for solid state display device applications.

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Acknowledgments

The authors gratefully recognize the financial support from the University Grant Commission (UGC), New Delhi [MRP-40-73/2011(SR)] and the European Commission through Nano CIS project (FP7-PEOPLE-2010-IRSES ref. 269279).

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Authors and Affiliations

  1. Department of Chemistry, Maharshi Dayanand University, Rohtak, Haryana, 124001, India

    Devender Singh, Vijeta Tanwar, Pratap Singh Kadyan & Ishwar Singh

  2. Centro de Fisica, Universidade of Minho, 4710057, Braga, Portugal

    Devender Singh & Anura P. Simantilleke

  3. Departament de Física Aplicada, Universitat Politècnica de València, 46022, València, Spain

    Bernabe Mari

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  1. Devender Singh
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  2. Vijeta Tanwar
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Correspondence to Devender Singh.

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Singh, D., Tanwar, V., Simantilleke, A.P. et al. Rapid synthesis and enhancement in down conversion emission properties of BaAl2O4:Eu2+,RE3+ (RE3+=Y, Pr) nanophosphors. J Mater Sci: Mater Electron 27, 2260–2266 (2016). https://doi.org/10.1007/s10854-015-4020-1

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  • DOI: https://doi.org/10.1007/s10854-015-4020-1

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