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Solvothermal synthesis and luminescent properties of YAG:Tb nano-sized phosphors |
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| Authors: | Xia Li Hong Liu Hongmei Cui IR Boughton |
| Institution: | a The State Key Laboratory on Crystal Materials, Shandong University, Jinan 250100, China b Department of Materials Science and Technology, Shandong Institute of Light Industry, Jinan 250100, China c Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA |
| Abstract: | Nano-sized Tb-doped YAG phosphor particles were synthesized by a mixed solvo-thermal method using stoichiometric amounts of inorganic aluminum and yttrium salts. The formation of YAG:Tb was investigated by means of XRD and IR spectra. The pure crystalline-phase YAG was prepared under moderate synthesis conditions (300 °C and 10 MPa), indicating that ethanol partly replaces water as the solvent, thus favoring the formation of YAG. TEM images showed that YAG:Tb phosphor particles sintered at 300 °C were basically of spherical shape, with good dispersion about a particle size of around 80 nm. The crystalline YAG:Tb showed green emission with 5D4−7F6 (544 nm) as the most prominent group. The PL intensity and crystallinity of YAG:Tb phosphors increases with increasing synthesis temperature, and reaches maximum brightness at 300 °C, which is lower than that exhibited by a commercial product. |
| Keywords: | A Oxides C Electron microscopy C X-ray diffraction D Luminescence |
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