Abstract

${\mathrm{Ba}}_2\mathrm{Mg}{({\mathrm{BO}}_3)}_2\text{:}{\mathrm{Eu}}^{2+}$ phosphors incorporated with two different sensitizers, ${\mathrm{Mn}}^{2+}$ or ${\mathrm{Ce}}^{3+}$, were prepared and their emission properties, especially for color purity and thermal stability, were investigated thoroughly. The overall emission property induced by the ${\mathrm{Eu}}^{2+}$ ion and the resultant thermal behavior were strongly dependent on the type of codoped sensitizer ions, ${\mathrm{Mn}}^{2+}$ or ${\mathrm{Ce}}^{3+}$. Intense red emission peaking at 620 nm was obtained upon 370 nm excitation of the ${\mathrm{Mn}}^{2+}$-sensitized phosphor and the resultant light-emitting diode lamps using the given phosphor exhibited a more reddish emission with chromaticity coordinates of (0.602, 0.340). Thus, we can meet the purpose of illuminating elements by designing the proper chemical composition of the ${\mathrm{Eu}}^{2+}$-activated ${\mathrm{Ba}}_2\mathrm{Mg}{({\mathrm{BO}}_3)}_2$ phosphor using different sensitizers: a more reddish emitting ${\mathrm{Mn}}^{2+}$-sensitized one for backlight units and a bright yellow-emitting ${\mathrm{Ce}}^{3+}$-sensitized one for solid-state lightings.

© 2014 Optical Society of America

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