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Enhanced luminescence in CaMoO4: Eu3+ red phosphor nanoparticles prepared by mechanochemically assisted solid state meta-thesis reaction method

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Abstract

For the first time, CaMoO4: xEu3+ (x = 0.02, 0.04, 0.06, 0.08, 0.1) red phosphor nanoparticles were synthesized using the simple mechanochemically assisted solid state meta-thesis (SSM) reaction method and the luminescence properties as a function of Eu3+ ion concentration was investigated. The characteristics of the phosphor materials were analyzed using X-ray diffraction, fourier transform infrared spectroscopy, photoluminescence (PL) and diffuse reflectance spectroscopy. For 8 mol% of Eu3+ concentration, the phosphor shows an intensified excitation peak at 392 nm indicating a strong absorption. The PL emission spectra of CaMoO4: Eu3+ phosphors showed an intense peak at 615 nm (red) which corresponds to 5D0 → 7F2 transition of Eu3+. The optimal Eu3+ concentration in CaMoO4 phosphors for enhanced red emission occurs for 8 mol% and above this concentration, the emission intensity decreases due to quenching effect. The CIE colour coordinates of the CaMoO4: 0.08Eu3+ red phosphor coincide very well with the standard values of NTSC. The red emission intensity of the SSM prepared CaMoO4: 0.08Eu3+ red phosphor is 4.7 times greater than that of the commercial Y2O2S: Eu3+ red phosphor and 1.6 times more than the same phosphor prepared by the solid state reaction method.

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Authors and Affiliations

  1. Department of Physics, St. Anne’s College of Engineering and Technology, Panruti, Tamil Nadu, India

    Anthuvan John Peter

  2. Department of Physics, B. S. Abdur Rahman University, Vandalur, Chennai, Tamil Nadu, India

    I. B. Shameem Banu & Jagannathan Thirumalai

  3. The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA

    Samuel Paul David

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  1. Anthuvan John Peter
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  2. I. B. Shameem Banu
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  3. Jagannathan Thirumalai
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  4. Samuel Paul David
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Correspondence to Anthuvan John Peter or I. B. Shameem Banu.

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John Peter, A., Shameem Banu, I.B., Thirumalai, J. et al. Enhanced luminescence in CaMoO4: Eu3+ red phosphor nanoparticles prepared by mechanochemically assisted solid state meta-thesis reaction method. J Mater Sci: Mater Electron 24, 4503–4509 (2013). https://doi.org/10.1007/s10854-013-1433-6

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