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Influence of Ce ion Concentration on Fluorescence Properties of Ce: TAG-Al2O3 Eutectic Mixed Crystals
He, Chongjun; Sai, Qinglin; Xia, Changtai; Hu, Huiling; hechongjun@nuaa.edu.cn
2017
发表期刊Cryst. Res. Technol.
卷号52期号:7
摘要Combining a blue LED chip with phosphor, white light can be obtained. In traditional white LEDs, the phosphor was dispersed in resin in a form of particles. Particle-resin composite has complex packaging and poor thermal stability. For high-power white LEDs, this combination cannot provide long-term stable work because of photo-degradation of the organic epoxy resin under high irradiation and high temperatures. Here we develop resin-free phosphor (Tb(1-n)Cen)(3)Al5O12-Al2O3 eutectic mixed crystals (Ce: TAG-Al2O3) to eliminate the photo-degradation issue of the organic material. They were grown by optical floating zone method. X-ray diffraction and scanning electron microscopy show that these materials have typical eutectic mixed crystal structure of sapphire and garnet phases, in which lamellar spacing is in an order of tens of microns. The doped Ce3+ ions do not influence basic structure of TAG crystal. Ce3+ ion replaces Tb3+ ion rather than Al3+ ion. Photoluminescence emission and excitation properties of the eutectic mixed crystals were investigated. They get to maximal value with 2.0% Ce-3+,Ce- and have wide excitation band at 470 nm. Luminous efficiency of eutectic mixed crystal- packaged LED is higher than that of particle- resin composite packaged LED. These results show that Ce: TAG-Al2O3 eutectic mixed crystals are promising phosphor for white LEDs.
文章类型Article
部门归属材料
DOI10.1002/crat.201700056
资助者Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112]
收录类别SCI
资助者Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112] ; Fundamental Research Funds for the Central Universities [NZ2015112]
WOS记录号WOS:000405448700002
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.siom.ac.cn/handle/181231/28109
专题中科院强激光材料重点实验室
通讯作者hechongjun@nuaa.edu.cn
作者单位中国科学院上海光学精密机械研究所
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He, Chongjun,Sai, Qinglin,Xia, Changtai,et al. Influence of Ce ion Concentration on Fluorescence Properties of Ce: TAG-Al2O3 Eutectic Mixed Crystals[J]. Cryst. Res. Technol.,2017,52(7).
APA He, Chongjun,Sai, Qinglin,Xia, Changtai,Hu, Huiling,&hechongjun@nuaa.edu.cn.(2017).Influence of Ce ion Concentration on Fluorescence Properties of Ce: TAG-Al2O3 Eutectic Mixed Crystals.Cryst. Res. Technol.,52(7).
MLA He, Chongjun,et al."Influence of Ce ion Concentration on Fluorescence Properties of Ce: TAG-Al2O3 Eutectic Mixed Crystals".Cryst. Res. Technol. 52.7(2017).
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