Abstract
We examined the photoluminescent behaviors of and phosphors for use in white-light-emitting diodes. The red emission from phosphors consisted of two Gaussian components, P1 from a single ion and P2 from either pairs or clusters. Decay analysis based on the Yokota and Tanimoto equation identified long decay for P1 and fast decay for P2. Most importantly, codoping enhanced emission intensity; in particular, emission at excitations was promoted by the codoping.
© 2009 Optical Society of America
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