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Photoluminescence and cathodoluminescence of Mn doped zinc silicate nanophosphors for green and yellow field emissions displays

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Abstract

Mn2+-doped Zn2SiO4 (ZSM2+) was synthesized by a facile sol–gel technique. The obtained samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, photoluminescence (PL) and cathodoluminescence (CL) techniques. Under UV excitation, spectra showed that the α-ZSM2+ phosphor exhibited a strong green emission around 525 nm and reached the highest luminescence intensity with the Mn doping concentration of 5 at.%. However, for the β-ZSM2+ phase, an interesting yellow emission band centered at ~ 575 nm of Mn2+ at the Zn2+ tetrahedral sites was observed. In addition, an unusual red shift with increasing Mn2+ content was also found and attributed to an exchange interaction between Mn2+. Both PL and CL spectra exhibit an intense green and yellow emission centered at ~ 525 and ~ 573 nm, respectively, due to the 4T1 (4G)-6A1 (6S) transition of Mn2+. Furthermore, these results indicated that the Mn2+-doped zinc silicate phosphors may have potential applications in green and yellow emissions displays like field emission displays (FEDs).

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Authors and Affiliations

  1. Laboratoire de Physique des Matériaux et des Nanomatériaux Appliquée à l’Environnement, Faculté des Sciences de Gabès, Cité Erriadh Manara Zrig, 6072, Gabès, Tunisia

    K. Omri & L. El Mir

  2. National Nanotechnology Research Centre, KACST, Riyadh, Saudi Arabia

    A. Alyamani

  3. Department of Physics, College of Sciences, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia

    L. El Mir

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  1. K. Omri
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  3. L. El Mir
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Correspondence to K. Omri.

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Omri, K., Alyamani, A. & Mir, L.E. Photoluminescence and cathodoluminescence of Mn doped zinc silicate nanophosphors for green and yellow field emissions displays. Appl. Phys. A 124, 215 (2018). https://doi.org/10.1007/s00339-018-1657-7

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  • DOI: https://doi.org/10.1007/s00339-018-1657-7

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