| YAG:Ce3 荧光粉对白光LED衰减的影响 |
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| 引用本文： | 陈静波,王晶,苗洪利,张海翔.YAG:Ce3 荧光粉对白光LED衰减的影响[J].光电子．激光,2008,19(4):453-455. |
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| 作者姓名： | 陈静波 王晶 苗洪利 张海翔 |
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| 作者单位： | 中国海洋大学信息科学与工程学院,山东,青岛,266100 |
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| 摘 要： | 对封装的蓝光和白光LED进行了光衰对比试验,结果表明,白光LED初期衰减明显比蓝光LED快.因此,又对自制的YAG:Ce3 荧光粉进行了光照、温度测试,结果发现,荧光粉在光照作用下,荧光强度出现先降后升然后稳定的现象,跟白光LED的衰减相吻合,结合色坐标的偏移,蓝光LED本身的衰减仍是白光LED衰减的主要原因.
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| 关 键 词： | 白光LED 光衰 YAG:Ce3 荧光粉 荧光强度 色坐标 荧光粉 衰减 影响 Effect white LED degradation output light 色坐标 结合 现象 后稳定 荧光强度 作用 发现 温度测试 光照 自制 结果 对比试验 |
| 文章编号： | 1005-0086(2008)04-0453-03 |
| 修稿时间： | 2007年4月3日 |
Effect of the YAG:Ce3 phosphor on the light output degradation of white LED |
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| CHEN Jing-bo,WANG Jing,MIAO Hong-li,ZHANG Hai-xiang.Effect of the YAG:Ce3 phosphor on the light output degradation of white LED[J].Journal of Optoelectronics·laser,2008,19(4):453-455. |
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| Authors: | CHEN Jing-bo WANG Jing MIAO Hong-li ZHANG Hai-xiang |
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| Affiliation: | CHEN Jing-bo,WANG Jing,MIAO Hong-li,ZHANG Hai-xiang(Institute of Information Science , Engineering,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | We traced three group of LEDs,the light output degradation and color shift properties as a function of time were measured.The curve indicate that white-LED's degradation is faster than that of blue-LED,especially during the beginning 250 hours.So two experiments were conducted on our YAG:Ce3+ phosphor.A blue-LED lighting and a oven were used to test the YAG:Ce3+ phosphor.After 246 hours,the fluorescence intensity of phosphor decreased 14.2%,then,it increased to 91.4% of initial value,which just explained th... |
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| Keywords: | white-LED light output degradation YAG:Ce~(3 ) phosphor fluorescence intensity chromaticity coordinate/CIE x y values |
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