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The luminescence color (green/red) of Mg B2O4:Mn (B=Al, Ga) phosphors was controlled by crystal-site engineering approach through adjusting the quantity of MgO in raw materials. Though the stoichiometric samples (Mg/B=1:2) indicated both green and red luminescence, the samples prepared with deficient-MgO and excess-MgO showed only green and red emission, respectively. The green and red luminescence...
The amorphous alumina phosphors without containing expensive or toxic elements were prepared via a solution method. The obtained sample indicates bluish-white emission centered at 390–430nm by UV excitation. According to the measurement results of Electron Spin Resonance (ESR), Fourier Transform Infrared Spectroscopy (FT-IR) and organic microanalysis, it is found that the carbon impurities exist in...
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