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http://dx.doi.org/10.4191/KCERS.2004.41.8.573

Luminescence Characteristics of Sr3MgSi2O8：Eu Blue Phosphor for Light Emitting Diodes  

최경재 (한국화학연구원 화학소재연구부)
박정규 (한국화학연구원 화학소재연구)
김경남 (한국화학연구원 화학소재연구)
김창해 (한국화학연구원 화학소재연구)
김호건 (한양대학교 응용화학과)
Publication Information
Journal of the Korean Ceramic Society / v.41, no.8, 2004 , pp. 573-577 More about this Journal
Abstract
We have synthesized a Eu$^{2＋}$-activated Sr$_3$MgSi$_2$ $O_{8}$ blue phosphor and investigated an attempt to develop blue LEDs by combining it with a InGaN blue LED chip (Len=405 nm). The InGaN-based Sr$_3$MgSi$_2$ $O_{8}$：Eu LED Lamp shows two bands at 405 nm and 460 nm. The 405 nm emission band is due to a radiative recombination from a InGaN active layer. This 405 nm emission was used as an optical transition of the Sr$_3$MgSi$_2$ $O_{8}$：Eu phosphor. The 460 m emission band is ascribed to a radiative recombination of Eu$^{2＋}$ impurity ions in the Sr$_3$MgSi$_2$ $O_{8}$ host matrix. As a consequence of a preparation of W blue LED Lamp using the Sr$_3$MgSi$_2$ $O_{8}$：Eu blue phosphor, the highest luminescence efficiency was obtained at the ration of epoxy/blue phosphor(1/0,202). At this time, the CIE chromaticity was x=0.1417 and y=0.0683.
Keywords
Phosphor; LED (1ight Emitting Diode); PL; UV blue LED Lamp;
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