Abstract
phosphors incorporated with two different sensitizers, or , were prepared and their emission properties, especially for color purity and thermal stability, were investigated thoroughly. The overall emission property induced by the ion and the resultant thermal behavior were strongly dependent on the type of codoped sensitizer ions, or . Intense red emission peaking at 620 nm was obtained upon 370 nm excitation of the -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 -activated phosphor using different sensitizers: a more reddish emitting -sensitized one for backlight units and a bright yellow-emitting -sensitized one for solid-state lightings.
© 2014 Optical Society of America
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