發光二極體激發之SrSi2N2O2:Yb化合物螢光粉介紹

An Introduction of SrSi2N2O2:Yb Phosphors for Light Emitting Diodes

劉如熹(Ru-Shi Liu) ； 劉宇桓(Yu-Huan Liu)

《科儀新知》 154期 (2006/10) Pp. 26-32

https://doi.org/10.29662/IT.200610.0004

摘要

1996年日本日亞化學公司以藍光晶片搭配黃色釔鋁石榴石型螢光粉而發展白光發光二極體，開啓發光二極體邁入照明市場之序幕。雖此法製造白光發光之效率佳，然其光色色溫高、演色性差，且有氣化物螢光材料於高溫下熱衰竭等缺點。本文提出以氣氮化合物為主體結構之螢光粉(SrSi2N2O2:Yb)。此氧氮化合物因具較純氧化物弦之共價性，故於高溫穩定性較佳，並利用光激發光光譜儀(photoluminescence, PL)分析螢光粉之激發光譜與放射光譜特性。

並列摘要

Light Emitting Diodes The first white LED, commercialized in 1996, is composed of a blue LED and a yellow phosphor layer, namely, yttrium aluminum garnet (YAG). The color rendering index (Ra) of the YAG-based LED is about 80, which is enough for general illumination. However, it is not suitable for certain medical applications and architectural lighting purposes due to the poor performance of red component in the spectra. Moreover, the YAG phosphor has the disadvantage of thermal quenching at high temperature. In this study, we concentrate on SrSi2N2O2:Yb phosphors among the oxynitride compounds, which are nontoxic and stable under high temperature. Besides, photoluminescence (PL) and the CIE chromaticity coordinates were obtained to show emission properties.