Abstract
and codoped, white-emitting phosphors are prepared, and their emission properties, especially for thermal stability, are thoroughly investigated. The thermal quenching and energy transfer efficiency are totally different in the ratio of alkaline earth metals in host composition, , , and , respectively. Furthermore, by using near-ultraviolet light-emitting diodes (LEDs) and the corresponding , phosphor as light converters, we demonstrate a bright and thermally stable white-emitting LED. The resultant LED exhibits a warm white light [, CIE coordinates of (0.33, 0.31)] with excellent thermal and hydrolytic stabilities comparable to those of commercially available ones, and . The proposed composition, with its efficient energy transfer, could enable and codoped to be a promising single component phosphor for cost-effective white-emitting LEDs.
© 2013 Optical Society of America
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