Abstract

We examined the photoluminescent behaviors of $\mathrm{Mg}\mathrm{Si}{\mathrm{N}}_2:{\mathrm{Mn}}^{2+}$ and $\mathrm{Mg}\mathrm{Si}{\mathrm{N}}_2:{\mathrm{Ce}}^{3+},{\mathrm{Mn}}^{2+}$ phosphors for use in white-light-emitting diodes. The red emission from $\mathrm{Mg}\mathrm{Si}{\mathrm{N}}_2:{\mathrm{Mn}}^{2+}$ phosphors consisted of two Gaussian components, P1 from a single ${\mathrm{Mn}}^{2+}$ ion and P2 from either ${\mathrm{Mn}}^{2+}$ pairs or clusters. Decay analysis based on the Yokota and Tanimoto equation identified long decay for P1 and fast decay for P2. Most importantly, ${\mathrm{Ce}}^{3+}$ codoping enhanced ${\mathrm{Mn}}^{2+}$ emission intensity; in particular, emission at $460\mathrm{nm}$ excitations was promoted by the ${\mathrm{Ce}}^{3+}$ codoping.

© 2009 Optical Society of America

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