Fabrication of Ce:YAG, Ce,Cr:YAG and Ce:YAG/Ce,Cr:YAG dual-layered composite phosphor ceramics for the application of white LEDs
Fabrication of Ce:YAG, Ce,Cr:YAG and Ce:YAG/Ce,Cr:YAG dual-layered composite phosphor ceramics for the application of white LEDs
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DOI：
10.1016/j.ceramint.2013.12.034
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发表时间：
2014-06
影响因子：
5.2
通讯作者：
Xuezhuan Yi;Shengming Zhou;Chong Chen;Hui Lin;Yue Feng;Kai Wang;Yi Ni
中科院分区：
文献类型：
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作者：
Xuezhuan Yi;Shengming Zhou;Chong Chen;Hui Lin;Yue Feng;Kai Wang;Yi Ni
采用固相反应法和真空烧结法合成了（Ce0.001Y0.999）3Al 5 O 12和（Ce0.001Y0.999）3（CrxAl 1 −x）5 O 12（x=0.001−0.005）透明陶瓷，并对其光学性能进行了测试。将Ce：YAG/Ce，Cr：YAG双层复合陶瓷直接与商用蓝光LED芯片结合，获得了高质量的白色光。在4905 K的低相关色温下获得了超过76 lm/W的最大发光效率。色温可以通过改变Cr ~（3+）浓度和陶瓷厚度来控制。因此，Ce：YAG/Ce，Cr：YAG双层复合荧光粉陶瓷有望成为白色LED的候选材料。
(Ce0.001Y0.999)3Al5O12and (Ce0.001Y0.999)3(CrxAl1−x)5O12(x=0.001−0.005) transparent ceramics were synthesized by the solid state reaction and vacuum sintering and their optical properties were measured. High quality white light was obtained when the Ce:YAG/Ce,Cr:YAG dual-layered composite ceramic was directly combined with commercial blue LED chip. A maximum luminous efficacy exceeding 76 lm/W at a low correlated color temperature of 4905 K was obtained. The color temperature can be controlled by variations of Cr3+concentration and the ceramic thickness. Hence, the Ce:YAG/Ce,Cr:YAG dual-layered composite phosphor ceramic may be a promising candidate for white LEDs.