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An efficient blue-emitting phosphor : for white LEDs

✍ Scribed by Chuiming Wan; Jianxin Meng; Fengjin Zhang; Xiaoling Deng; Chuangtao Yang

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 362 KB
Volume: 150
Category: Article
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2010.05.037

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✦ Synopsis

A new blue-emitting phosphor LiCaPO 4 :Eu 2+ was synthesized by solid state reaction at a relatively low temperature of 900 °C. It gives a single intense emission band centering at 470 nm, which corresponds to the 4f 6 5d 1 → 4f 7 transition of Eu 2+ . The dependence of luminescence intensities on Eu 2+ concentration was investigated. The phosphor, with a single excitation band extending from 250 to 400 nm, could be efficiently excited by near-ultraviolet light-emitting diodes and is believed to be a promising blueemitting phosphor for white light-emitting diodes.

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