Hydrothermal Synthesis of Ce 3+ and Tb 3+ co-doped Ca 3 Al 2 (OH) 12 Luminescent Material
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L6.15.1
Hydrothermal Synthesis of Ce3+ and Tb3+ co-doped Ca3Al2(OH)12 Luminescent Material Fushan Wen1,2,3, Jiesheng Chen2, Jin Hyeok Kim1*, Taeun Kim1 and Wenlian Li3 1
Center for Photonic Materials and Devices, Department of Materials Science and Engineering, Chonnam National University 300 Yongbongdong Pukgu Kwangju, South Korea, 500-757 2 State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, 119 Jiefang Road，Changchun, 130023, P. R. China 3 Key Laboratory of the Excited States Process, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People’s Republic of China ABSTRACT Ce3+ and Tb3+ co-doped calcium aluminates luminescent material (Ca3Al2(OH)12: Ce3+, Tb3+) was synthesized at 453 K in hydrothermal system without any protective atmospheres. All the reactants used in the system were simple inorganic salts. The crystallinity and luminescent property of as-synthesized compound were investigated using X-ray diffraction and luminescence spectrometer. The compound formula was confirmed to be Ca3Al2(OH)12. The emission spectrum showed that only typical Tb3+ emission was observed and the emission from Ce3+ was almost not observed, which should be attributed to the energy transfer from Ce3+ to Tb3+ in the compound. The emission peaks at about 486 nm, 498 nm, 540 nm, 549 nm, 582 nm, 595 nm and 623 nm should be assigned to 5D4-7F6, 5D4-7F5, 5D4-7F4, and 5D4-7F3 transitions of Tb3+ ions. The weak emission peak at about 380 nm should be assigned to the emission of Ce3+ ions in the compound. INTRODUCTION Aluminates phosphors have been widely used for a long time in various luminescent applications such as three-band fluorescence lamps and plasma display panels (PDP) [1,2]. BaMgAl10O17 :Eu2+ (BAM) phosphors have been used as a blue component in fluorescence lamps. The green phosphors, Tb3+ activated CaGdAlO4, CaGdAl3O7 and GdAlO3 have been synthesized by combinatorial polymerized-complex method [3]. SrAl2O4 phosphors doped with Eu2+ and Dy3+ are known to exhibit a bright and long-lasting afterglow after irradiation with fluorescent light or sunlight [4-6]. The energy transfer in the Tb3+ activated yttrium aluminate was investigated by Kee-Sun Sohn [7]. Ce3+ activated Y3Al5O12 was also investigated by Baciero et al. [8] which was used as vacuum ultraviolet and x-ray luminescent material. Even though, aluminates luminescent materials have provoked researchers’ considerable interests because of their excellent luminescent properties, all the above luminescent materials were prepared by classical high temperature solid-state method. However, compared with the high temperature solid-state method, hydrothermal method has the advantages as follows: reaction temperature is low and it is easy to control the size of particle.
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The purpose of this study is to synthesis Ce3+ and Tb3+ co-doped calcium aluminates luminescent materials using hydrothermal method and to investigate their luminescent properties at room tem
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