White LED phosphors: the next step
White LED phosphors: the next step
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DOI：
10.1117/12.843536
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发表时间：
2010-02
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影响因子：
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通讯作者：
Hajime Yamamoto
中科院分区：
文献类型：
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作者：
Hajime Yamamoto
白光LED的应用扩展到高输出光源，例如用于汽车前照灯，以及与用于LCD背光的滤光片进行更好的光谱匹配。为了满足这种新的需求，人们对荧光粉材料进行了研究，重点研究了它们的发光光谱、温度特性和可靠性。基于Y3Al5O12：Ce3+的常规黄色荧光粉作为单一荧光粉与蓝色LED组合具有优异的性能。最近开发的用Eu2+活化的氮硅酸盐或氧氮硅酸盐也是一种很有前途的材料，根据组成的不同显示出从绿色到红色的发光以及高的热稳定性和化学稳定性。然而，对具体应用的要求已经明确和强烈。本文综述了荧光粉的现状和下一阶段的挑战目标，以期在白光LED方面取得更大的进展。
Application of white LEDs is extended toward high-output light sources, e.g. for automotive headlights, and better spectral matching with optical filters for LCD backlighting. To meet such new demands, phosphor materials have been investigated with focus on their luminescence spectra, temperature characteristics and reliability. The conventional yellow phosphor based on Y3Al5O12:Ce3+ has excellent performance as a single phosphor combined with a blue LED. More recently developed nitrido- or oxonitrido-silicates activated with Eu2+ are also promising materials showing green to red luminescence depending on a composition and high thermal and chemical stability. And yet, demands for specific application have been made clear and strong. This paper reviews the present status and challenging goals of phosphors in the next stage further to make progress in white LEDs.