| This year, white LED lighting in the area to flourish, and the range of applications is more and more widely, YAG:Ce3+as key white LED material has also become a hot research.In this paper, the main high-temperature solid-phase method, In the form of double-doped, and added AlF3, BaF2and H3BO3as a flux,preparation of high-efficiency light-emitting YAG:Ce3+phosphor.The luminescent properties, particle size and morphology of the powder phase were characterized using fluorescence spectroscopy, XRD, SEM and testing means. When the temperature is1400℃,added about18mol%of Ce3+obtained the maximum luminous intensity.The results showed that when the Si-N bond replacement Al-O bond, the maximum emission wavelength of the sample slightly red-shifted, the highest emission peak at531nm nearby.When Mg2+-Si4+replaces Al3+, red-orange phosphor prepared very broad emission peak near535nm-563nm,Analysis is a characteristic transition of Ce3+of5dâ†'4f.Compared with YAG:Ce3+phosphor emission wavelength redshift of maximum emission peak at563nm at. |
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