a (Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
b (Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Department of Physics, School of Science, Renmin University of China, Beijing 100872,China)
c (University of Chinese Academy of Sciences, Beijing 100039, China)
Structure, Chemical State and Luminescent Properties of Ce,Gd:YAG Transparent Ceramic for Flip-chip White LED Application
DENG Zhong-Hua;CHEN Jian;LIU Zhu-Guang;ZHANG Wei-Feng;HUANG Ji-Quan;HUANG Qiu-Feng;GUO Wang;CAO Yong-Ge
a (Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
b (Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Department of Physics, School of Science, Renmin University of China, Beijing 100872,China)
c (University of Chinese Academy of Sciences, Beijing 100039, China)
Ce,Gd:YAG transparent ceramic was prepared by tape casting and solid state reac- tion method. Meanwhile, its crystal structure, chemical state and luminous properties were discussed. The prepared samples are identified as pure garnet structure by the XRD results. The valence states of tetravalent and trivalent Ce ions were identified distinctly by X-ray photoelectron spectroscopy. A strong broad band yellow emission was found in photoluminescence (PL) spectra. The quantum yield reached 90.2% at room temperature. When collaborated with a 1.0 mm × 1.0 mm flip-chip, a luminous efficiency (LE) as high as 116.5 lm/W with a correlated color temperature (CCT) of 6627 K at a power dissipation of 1.13 W at 350 mA was demonstrated, indicating that Ce,Gd:YAG transparent ceramics had a promising potential for high power white light-emitting diodes.
Supported by the Major Program for Research on LED of Chinese Academy of Science (KZCC-EW-106), the National Key Research and Development Program of China (2016YFB0701003), and the Natural Science Foundation of Fujian Province (2015j01231)
邓种华;陈剑;刘著光;张卫峰;黄集权;黄秋凤;郭旺;曹永革. Ce,Gd:YAG透明陶瓷的结构、化学状态和发光性质及其在倒装白光LED中的应用[J]. 结构化学, 2018, 37(6): 948-954.
DENG Zhong-Hua;CHEN Jian;LIU Zhu-Guang;ZHANG Wei-Feng;HUANG Ji-Quan;HUANG Qiu-Feng;GUO Wang;CAO Yong-Ge. Structure, Chemical State and Luminescent Properties of Ce,Gd:YAG Transparent Ceramic for Flip-chip White LED Application. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2018, 37(6): 948-954.
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2018, Vol. 37 
