Transparent Ce:Y3Al5O12 ceramic phosphors for white light-emitting diodes

We present our recent achievement of a transparent ceramic able to produce white light when directly combined with commercially available blue light emitting diodes. The photoluminescence properties of ceramic phosphor (Y1-xCex)3Al5O12 are studied as a function of doping fraction (x = 0.0005-0.0020)...

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Bibliographic Details
Published in:Applied physics letters 2012-08, Vol.101 (6)
Main Authors: Wei, Nian, Lu, Tiecheng, Li, Feng, Zhang, Wei, Ma, Benyuan, Lu, Zhongwen, Qi, Jianqi
Format: Article
Language:English
Subjects:
Ceramics
Color
Correlation
Emission
Light-emitting diodes
Luminous efficacy
Phosphors
White light
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Summary:We present our recent achievement of a transparent ceramic able to produce white light when directly combined with commercially available blue light emitting diodes. The photoluminescence properties of ceramic phosphor (Y1-xCex)3Al5O12 are studied as a function of doping fraction (x = 0.0005-0.0020). The emission color is tunable by variations of Ce3+ concentration and ceramic phosphor thickness. A maximum luminous efficacy exceeding 93 lm/W at a low correlated color temperature of similar to 4600 K is obtained, which is superior to samples made from commercial phosphor powders. Hence, the present transparent ceramic phosphor is expected to be an ideal candidate for generating white light.
ISSN:0003-6951
DOI:10.1063/1.4742896