Abstract
Eu2+-doped SiAlON phosphors with the composition of EuxSi6−zAlzOzN8−z (0.5≤z≤3) at a fixed x=0.01 were synthesized by the gas pressure sintering method. Dependence of luminescence properties on the phase compositions in β-SiAlON:Eu2+ phosphors has been examined via fluorescence microscope and scanning electron microscope equipped with a cathodoluminescence spectrometer and an energy dispersive spectrometer. Bimodal emission (green and violet) from β-SiAlON phase is observed in the samples with z≥2, indicating co-existence of two different kinds of coordination for Eu2+ ions in the host lattice.
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