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
Jie Chen
中科院分区:
材料科学2区
文献类型:
--
作者:
Yanru Tang;Shengming Zhou;Xuezhuan Yi;Deming Hao;Xiuchen Shao;Jie Chen

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采用真空烧结法制备了Ce/Pr掺杂YAG(Ce:Pr:YAG)透明陶瓷.对样品的晶体结构和形貌、Ce ~(3+)与Pr ~(3+)之间的能量传递以及发光性能进行了测试和讨论。研究了原料粉末的显微结构以及Ce ~(3+)和Pr ~(3+)离子的掺杂量对YAG陶瓷显微结构的影响。在光致发光光谱中,观察到Pr 3+离子在608 nm和638 nm处的特征发射峰,因此采用改性的Ce:Pr:YAG荧光粉获得了显色性能得到改善的白色发光二极管(WLED)。陶瓷荧光粉的复合相结构是为了通过打破陶瓷与空气界面处的全内反射(TIR)来改善提取效率和提高发光效率而设计的。
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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