Impact of Eu3+ Dopants on Optical Spectroscopy of Ce3+: Y3Al5O12-Embedded Transparent Glass-Ceramics
Impact of Eu3+ Dopants on Optical Spectroscopy of Ce3+: Y3Al5O12-Embedded Transparent Glass-Ceramics
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Eu3 掺杂剂对 Ce3:Y3Al5O12 嵌入透明微晶玻璃光谱的影响
DOI：
10.1111/jace.13668
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发表时间：
2015-08
影响因子：
3.9
通讯作者：
Ji, Zhenguo
中科院分区：
文献类型：
--
作者：
Zhou, Yang;Chen, Daqin;Tian, Wendong;Ji, Zhenguo
采用低温共烧结技术成功制备了含Ce 3+：Y3 Al 5 O 12荧光粉和Eu 3+离子的透明微晶玻璃，探索了其在白色发光二极管（WLED）中的潜在应用。使用配备有能量色散X射线光谱仪的扫描电子显微镜研究样品的微观结构。通过发射光谱、激发光谱和衰减曲线，系统研究了共烧温度、Ce 3+：Y3 Al 5 O 12晶体含量和Eu 3+掺杂量对微晶玻璃光学性能的影响。值得注意的是，这两种不同的激活剂在本发明的玻璃-陶瓷中的空间分离，其中Ce 3+离子位于YAG晶相中，而Eu 3+离子留在玻璃基质中，有利于实现归属于Ce 3+：5d→4f跃迁的强黄色发光和源自Eu 3+：4f→4f跃迁的红色发光。结果表明，微晶玻璃的量子产率高达93%，所制备的WLED的最佳发光效率为122 lm/W，相关色温为6532 K，显色指数为75。
Transparent glass-ceramics containing Ce3+: Y3Al5O12 phosphors and Eu3+ ions were successfully fabricated by a low-temperature co-sintering technique to explore their potential application in white light-emitting diodes (WLEDs). Microstructure of the sample was studied using a scanning electron microscope equipped with an energy dispersive X-ray spectroscopy. The impact of co-sintering temperature, Ce3+: Y3Al5O12 crystal content and Eu3+ doping content on optical properties of glass-ceramics were systematically studied by emission, excitation spectra, and decay curves. Notably, the spatial separation of these two different activators in the present glass-ceramics, where Ce3+ ions located in YAG crystalline phase while the Eu3+ ones stayed in glass matrix, is advantageous to the realization of both intense yellow emission assigned to Ce3+: 5d→4f transition and red luminescence originating from Eu3+: 4f→4f transitions. As a result, the quantum yield of the glass-ceramic reached as high as 93%, and the constructed WLEDs exhibited an optimal luminous efficacy of 122 lm/W, correlated color temperature of 6532 K and color rendering index of 75.
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