期刊
DALTON TRANSACTIONS
卷 44, 期 22, 页码 10321-10329出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt00815h
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资金
- National Science Foundation for Distinguished Young Scholars [50925206]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120211130003]
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 degrees 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.
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