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.
REFERENCES
(1) Nakamura, S.; Fasol, G. The Blue Laser Diode: GaN Based Light Emitters and Lasers. Springer: New York 1997, 1343.
(2) Arjoca, S.; Villora, E. G.; Inomata, D.; Arai, Y.; Cho, Y.; Sekiguchi, T.; Shimamura, K. High homogeneity, thermal stability and external quantum efficiency of Ce:YAG single-crystal powder phosphors for white LEDs. J. Ceram. Soc. Jpn. 2016, 124, 574578.
(3) Shi, H. L.; Chen, J.; Huang, J. Q.; Hu, Q. Q.; Deng, Z. H.; Cao, Y. G.; Yuan, X. Y. Preparation and luminescence properties of YAG: Ce phosphor for white LED application via a vacuum sintering method. Phys. Status Solidi A 2014, 211, 15961600.
(4) Zhang, R.; Lin, H.; Yu, Y. L.; Chen, D. Q.; Xu, J.; Wang, Y. S. A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass. Laser Photonics Rev. 2014, 8, 158164.
(5) Chen, D. Q.; Xiang, W. D.; Liang, X. J.; Zhong, J. S.; Yu, H.; Ding, M. Y.; Lu, H. W.; Ji, Z. G. Advances in transparent glass-ceramic phosphors for white light-emitting diodes — a review. J. Eur. Ceram. Soc. 2015, 35, 859869.
(6) Yang, C.; Gu, G. R.; Zhao, X. J.; Liang, X. J.; Xiang, W. D. The growth and luminescence properties of Y3Al5O12:Ce3+ single crystal by doping Gd3+ for W-LEDs. Mater. Lett. 2016, 170, 5861.
(7) Arjoca, S.; Villora, E. G.; Inomata, D.; Aoki, K.; Sugahara, Y.; Shimamura, K. Temperature dependence of Ce:YAG single-crystal phosphors for high-brightness white LEDs/LDs. Mate. Res. Express 2015, 2, 0555039.
(8) Chen, J.; Deng, Z. H.; Liu, Z. G.; Lin, Y.; Lan, H.; Chen, D. C.; Fei, B. J.; Wang, C.; Wang, F. Y.; Hu, Q. Q., Cao, Y. G. Optical enhancement brought by doping Gd3+ ions into Ce: YAG ceramics for indoor white light-emitting diodes. Opt. Express 2015, 23, A292A298.
(9) Hu, S.; Lu, C. H.; Zhou, G. H.; Liu, X. X.; Qin, X. P.; Liu, G. H.; Wang, S. W.; Xu, Z. Z. Transparent YAG:Ce ceramics for WLEDs with high CRI: Ce3+ concentration and sample thickness effects. Ceram. Int. 2016, 42, 69356941.
(10) Schubert, E. F.; Kim, J. K. Solid-state light sources getting smart. Science 2005, 308, 12741278.
(11) Guo, W.; Shi, H. L.; Huang, J. Q.; Deng, Z. H.; Yuan, X. Y.; Cao, Y. G. Spectral property and thermal quenching behavior of Tb3+-doped YAG:Ce phosphor. Chin. J. Struc. Chem. 2016, 35, 326-334.
(12) He, X. W.; Liu, X. F.; Li, J. R.; Yu, R. H. Local structure mediation and photoluminescence of Ce3+- and Eu3+-codoped YAG nanophosphors. Chin. J. Struc. Chem. 2018, 37, 383-392.
(13) Wang, W. N.; Widiyastuti, W.; Ogi, T.; Lenggoro, I. W.; Okuyama, K. Correlations between crystallite/carticle size and photoluminescence properties of submicrometer phosphors. Chem. Maert. 2007, 19, 17231730.
(14) Fujita, S.; Umayahara, Y.; Tanabe, S. Influence of light scattering on luminous efficacy in Ce:YAG glass-ceramic phosphor. J. Ceram. Soc. Jpn. 2010, 118, 128131.
(15) Won, C. W.; Nersisyan, H. H.; Won, H. I.; Lee, J. H.; Lee, K. H. Efficient solid-state route for the preparation of spherical YAG:Ce phosphor particles. J. Alloy. Compd. 2011, 509, 26212626.
(16) Tsai, M. S.; Fu, W. C.; Wu, W. C.; Chen, C. H.; Yang, C. H. Effect of the aluminum source on the formation of yttrium aluminum garnet (YAG) powder via solid state reaction. J. Alloy. Compd. 2008, 455, 461464.
(17) Li, M. J.; Wu, Y. C.; Yen, F. S.; Huang, C. Y. Influence of ionic mobility on the phase transformation route in Y3Al5O12 (YAG) stoichiometr. J. Eur. Ceram. Soc. 2011, 31, 20992106.
(18) Wang, B.; Qi, H. J.; Han, H. T.; Song, Z. H.; Chen, J. Y.; Shao, J. D. Structural, luminescent properties and chemical state analysis of YAG:Ce nanoparticle-based films. Opt. Mater. Express 2016, 6, 155165.
(19) Wang, P.; Wang, D. J.; Song, J.; Mao, Z. Y.; Lu, Q. F. Incorporation of Si–O induced valence state variation of cerium ion and phase evolution in YAG:Ce phosphors for white light emitting diodes. J. Mater. Sci.-Mater. El. 2012, 23, 17641769.
(20) Zych, E.; Brecher, C.; Glodo, J. Kinetics of cerium emission in a YAG:Ce single crystal: the role of traps. J. Phy. Condens. Mat. 2000, 12, 19471958.
(21) Wong, C. M.; Rotman, S. R.; Warde, C. Optical studies of cerium doped yttrium aluminum garnet single crystals. Appl. Phys. Lett. 1984, 44, 10381040.
(22) Latynina, A.; Watanabe, M.; Inomata, D.; Aoki, K.; Sugahara, Y.; García Víllora, E.; Shimamura, K. Properties of Czochralski grown Ce,Gd:Y3Al5O12 single crystal for white light-emitting diode. J. Alloy. Compd. 2013, 553, 8992.
(23) George, N. C.; Pell, A. J.; Dantelle, G. R.; Page, K.; Llobet, A.; Balasubramanian, M.; Pintacuda, G.; Chmelka, B. F.; Seshadri, R. Local environments of dilute activator ions in the solid-state lighting phosphor Y3–xCexAl5O12. Chem. Mater. 2013, 25, 39793995.
(24) Trudeau, M. L.; Tschöpe, A.; Ying, J. Y. XPS investigation of surface oxidation and reduction in nanocrystalline CexLa1-xO2-y. Surf. Interface Anal. 1995, 23, 219226.
(25) Barr, T. L.; Fries, C. G.; Cariati, F.; Bart, J. C.; Giordano, N. A spectroscopic investigation of cerium molybdenum oxide. J. Chem. Soc. 1983, 9, 18251829.