The characterization of Ce/Pr-doped YAG phosphor ceramic for the white LEDs
The characterization of Ce/Pr-doped YAG phosphor ceramic for the white LEDs
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白光LED用Ce/Pr掺杂YAG荧光粉陶瓷的表征
DOI:
10.1016/j.jallcom.2018.02.129
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发表时间:
2018-05
影响因子:
6.2
通讯作者:
Jie Chen
中科院分区:
文献类型:
--
作者:
Yanru Tang;Shengming Zhou;Xuezhuan Yi;Deming Hao;Xiuchen Shao;Jie Chen
Ce/Pr -doped YAG (Ce:Pr:YAG) transparent ceramics are fabricated by the vacuum sintering. The crystal structure and morphology, the energy transfer between Ce3+and Pr3+, and luminescence properties are measured and discussed. The effect of the micrographs of the starting powders and the doping contents of Ce3+and Pr3+ions on the microstructure of YAG ceramic is also exhibited. In the photoluminescence spectra, the characteristic emission peaks of Pr3+ions at 608 nm and 638 nm are observed, and therefore white light-emitting diodes (WLEDs) with improved color-rendering properties obtained by using modified Ce:Pr:YAG phosphors. The composite phase structure of ceramic phosphor is designed for improving the extraction efficacy and increasing the luminous efficacy by breaking the total internal reflection (TIR) at the interface between air and ceramic.
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