Abstract
Ca 3Sc 2Si 3O 12:Ce 3+ phosphors with single-phase were successfully synthesized by a gel-combustion method. Annealing atmosphere greatly affected the luminescent properties of the phosphor. The intensity of absorption band at 450 nm was greatly increased with a reducing atmosphere, which was very suitable as a color converter in white LED. The absorption at 243 and 311 nm was gradually enhanced with a stronger reducing atmosphere and a new absorption peak at 362 nm appeared in N 2+H 2 mixing gas. The emission intensity also increased when using reducing atmosphere. Meanwhile, the emission peaks slightly moved to the longer wavelength in reducing atmosphere. A white LED with higher color rending index and lower color temperature was obtained by putting our improved product Ca 3Sc 2Si 3O 12:Ce 3+ green phosphor and Sr 2Si 5N 8:Eu red phosphor onto a blue LED.
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