Cite this article:
Sahu and Gour (2017). Photoluminescence, Synthesis,Characterization of MgO Nanophosphors Influenced by Dy3+ Ions Concentrations. Journal of Ravishankar University (Part-B: Science), 30(1), pp.130-138.
Journal of Ravishankar
University-B, 30 (I &II), 130-138 (2017)
Photoluminescence, Synthesis,Characterization of MgO Nanophosphors Influenced
by Dy3+ Ions Concentrations
Gitanjali Sahu and Anubha S.
Gour
SOS in Physics and
Astrophysics,
Pt. Ravishankar Shukla
University, Raipur, Chhattisgarh, India
Corresponding author : geet.rjn29@gmail.com
[Received 18 September 2017; revised version 11
January 2018; accepted 31 January 2018]
Abstract: The present paper reports
the synthesis, characterization and photoluminescence (PL) studies of MgO:Dy3+
nanoparticles. In this work, MgO:Dy3+ nanophosphors were prepared
through solution combustion synthesis method using magnesium nitrate as
oxidizer and urea as a fuel. The as-obtained MgO:Dy3+ nanomaterials
were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray
(EDX) analysis, Fourier transformation infrared (FTIR) spectroscopy, scanning
electron microscopy (SEM), high resolution transmission electron microscope
(HRTEM), photoluminescence (PL) spectra and afterglow curve analysis. The cubic
structure of the MgO phosphors is confrmed by XRD analysis and crystalline size
calculated by Scherer’s formula using XRD data shows the nanocrystalline nature
of the phosphor. No phase change is observed with increasing concentrations of
Dy3+ ions. The surface morphology of the prepared phosphors is
determined by SEM, which shows a sphere-like structure and good connectivity of
the grains. The confrmation of the nanocrystalline phosphors is examined by
HRTEM analysis.The photoluminescence studies revealed that the emission spectra
of the prepared phosphors shows the broad emission centered at 435 nm and 480
nm due to the transition arises from the 4f→5d defect band transition of Dy3+
ions. The afterglow decay characteristics of different as synthesized MgO:Dy3+
nanophosphors are conceptually described. This is the first reported that on
the synthesis of nanocrystalline MgO:Dy3+ materials by combustion
method using urea as a fuel.
Keywords: X-ray diffraction,
energy-dispersive X-ray, Fourier transformation infrared, high resolution
transmission electron microscope, photoluminescence
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