MgO:Eu3+ red nanophosphor: Low temperature synthesis and photoluminescence properties

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 121; pp. 46 - 52
• Main Authors: Devaraja, P.B., Avadhani, D.N., Prashantha, S.C., Nagabhushana, H., Sharma, S.C., Nagabhushana, B.M., Nagaswarupa, H.P., Premkumar, H.B.
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 05-03-2014
• Subjects: Europium - chemistry; Luminescence; Magnesium Oxide - chemistry; MgO:Eu3; Nanoparticles - chemistry; Nanoparticles - ultrastructure; Optical absorption; Phosphor; Photoluminescence; Spectrometry, Fluorescence; Spectrophotometry, Ultraviolet; Spectroscopy, Fourier Transform Infrared; Temperature; Thermodynamics; X-Ray Diffraction; MgO:Eu3; Phosphor; Optical absorption; Photoluminescence; MgO:Eu(3+)
• ISSN: 1386-1425; 1873-3557
• DOI: 10.1016/j.saa.2013.10.060

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•Nanomaterials offer promising opportunities for applications in various fields.•Magnesium oxide (MgO) is an excellent wide band gap insulator.•Structural and PL of MgO:Eu3+ nanophosphor was studied.•Highest emission was recorded at 3mol% of Eu3+ doped MgO.
Nanoparticles of Eu3+ doped (0–9mol%) MgO were prepared using low temperature (400°C) solution combustion technique with metal nitrate as precursor and glycine as fuel. The powder X-ray diffraction (PXRD) patterns of the as-formed products show single cubic phase and no further calcination was required. The crystallite size was obtained using Scherer’s formula and was found to be 5–6nm. The effect of Eu3+ ions on luminescence characteristics of MgO was studied and the results were discussed in detail. These phosphors exhibit bright red emission upon 395nm excitation. The characteristic photoluminescence (PL) emission peaks at ∼580, 596, 616, 653, 696 and 706nm (5D0→7Fj=0, 1, 2, 3, 4) were recorded due to Eu3+ ions. The electronic transition corresponding to 5D0→7F2 of Eu3+ ions (616nm) was stronger than the magnetic dipole transition corresponding to 5D0→7F1 of Eu3+ ions (596nm). The international commission on illumination (CIE) chromaticity co-ordinates were calculated from emission spectra, the values (x, y) were very close to national television system committee (NTSC) standard value of red emission. Therefore the present phosphor was highly useful for display applications.