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Enhanced photoluminescence and charge density studies of novel (Sm1−x Gdx)2O3 nanophosphors for WLED applications

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Abstract

Pure Sm2O3 and Gd3+ doped Sm2O3 nanocrystalline powders were synthesized using the combustion method. The structural analysis from the Powder X-ray Diffraction revealed that pure and Gd3+ doped Sm2O3 nanocrystals of cubic phase with \(Ia\bar {3}~\) as the space group were produced. The High Resolution Transmission Electron Microscopy results confirmed that monodisperse nanocrystals having spherical shape were formed. The results of the Energy-Dispersive X-ray analysis confirmed that the samples were free from impurities. The UV–Vis-IR absorption and photoluminescence studies, carried out to study their optical properties, showed that these materials could be used for solid state lighting devices, particularly for UV/n-UV (near-ultraviolet) excited white light-emitting diodes. The charge density and photoluminescent behaviour in the chosen system were correlated using the MEM/Rietveld analysis.

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Authors and Affiliations

  1. Post Graduate and Research Department of Physics, The American College, Madurai, Tamilnadu, 625 002, India

    Morris Marieli Antoinette, S. Israel & G. J. Manoj

  2. Electro-Pyrometallurgy Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamilnadu, 630 003, India

    John L. Berchmans

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  1. Morris Marieli Antoinette
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  2. S. Israel
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Correspondence to S. Israel.

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Antoinette, M.M., Israel, S., Berchmans, J.L. et al. Enhanced photoluminescence and charge density studies of novel (Sm1−x Gdx)2O3 nanophosphors for WLED applications. J Mater Sci: Mater Electron 29, 19368–19381 (2018). https://doi.org/10.1007/s10854-018-0066-1

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