Abstract
In this work, blue-emitting phosphors were synthesized by firing powder mixtures of , AlN, , and at for 2 h under 1.0 MPa . The resultant phosphors were characterized by phase identification, diffuse reflectance spectra, photoluminescence spectra, quantum efficiency, and temperature-dependent luminescence. The samples showed high purity at the overall range of the varied and values. A single broad emission band centered at about 486 nm at 410 nm excitation was observed. Moreover, the phosphors showed high thermal stability, which could sustain 79–88% emission intensity measured at room temperature. These results indicate that the phosphors are promising wavelength-conversion materials for white light emitting diodes (LEDs) using near-UV LED chips as the primary light source.
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