Structure, Chemical State and Luminescent Properties of Ce,Gd：YAG Transparent Ceramic for Flip-chip White LED Application  

作　　者：邓种华 陈剑 刘著光 张卫峰 黄集权 黄秋凤 郭旺 曹永革 

机构地区：[1]Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Department of Physics, School of Science, Renmin University of China

出　　处：《Chinese Journal of Structural Chemistry》2018年第6期948-954,共7页结构化学（英文）

基　　金：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);the Natural Science Foundation of Fujian Province(2015j01231)

摘　　要：Ce,Gd：YAG transparent ceramic was prepared by tape casting and solid state reaction 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 m A was demonstrated, indicating that Ce,Gd：YAG transparent ceramics had a promising potential for high power white light-emitting diodes.Ce,Gd：YAG transparent ceramic was prepared by tape casting and solid state reaction 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 m A was demonstrated, indicating that Ce,Gd：YAG transparent ceramics had a promising potential for high power white light-emitting diodes.

关 键 词：Ce Gd：YAG crystal structure TRIVALENT fluorescence and luminescence 

分 类 号：TQ174.1[化学工程—陶瓷工业]