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

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7 Author(s)
Wei, Nian ; Department of Physics and Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064, People’s Republic of China ; Lu, Tiecheng ; Li, Feng ; Zhang, Wei
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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 ∼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.

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Applied Physics Letters  (Volume:101 ,  Issue: 6 )