| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1461168 | Ceramics International | 2014 | 5 Pages |
Abstract
(Ce0.001Y0.999)3Al5O12 and (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.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xuezhuan Yi, Shengming Zhou, Chong Chen, Hui Lin, Yue Feng, Kai Wang, Yi Ni,