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Issue 22, 2015
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Enhancing the emission intensity and decreasing the full widths at half maximum of Ba3Si6O12N2:Eu2+ by Mg2+ doping

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Abstract

The promising green oxynitride phosphor, Ba3−xMgxSi6O12N2:Eu2+ was synthesized by the solid-state reaction method. The effect of Mg2+ doping on the structure and photoluminescence (PL) properties of Ba3Si6O12N2:Eu2+ was investigated systematically. The results reveal that the phosphor retains the single phase of Ba3Si6O12N2, with the lattice expanding upon increasing the Mg2+ concentration, in an appropriate range. This suggests that a large portion of Mg2+ enters into the interstitial sites of the crystal lattice. At a certain concentration, Mg2+ doping can greatly enhance the absorption and PL intensity and decrease the full widths at half maximum (FWHM) of Ba3Si6O12N2:Eu2+ phosphors. The green phosphor Ba2.87Eu0.1Mg0.03Si6O12N2 exhibited a small thermal quenching, which remained 82% of the initial emission intensity when measured at 150 °C. The quantum efficiency measured at 400 nm excitation was 38.5%. All the results indicate that the solid solution Ba3−xMgxSi6O12N2:Eu2+ can be a good candidate for phosphors applicable in n-UV LEDs for solid-state lighting.

Graphical abstract: Enhancing the emission intensity and decreasing the full widths at half maximum of Ba3Si6O12N2:Eu2+ by Mg2+ doping

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Article information


Submitted
26 Feb 2015
Accepted
27 Apr 2015
First published
27 Apr 2015

Dalton Trans., 2015,44, 10321-10329
Article type
Paper

Enhancing the emission intensity and decreasing the full widths at half maximum of Ba3Si6O12N2:Eu2+ by Mg2+ doping

C. Wang, Z. Zhao, Q. Wu, G. Zhu and Y. Wang, Dalton Trans., 2015, 44, 10321
DOI: 10.1039/C5DT00815H

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