YAG:Ce nano-sized phosphor particles prepared by a solvothermal method |
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Authors: | Xia Li Hong Liu Jiyang Wang Feng Han |
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Affiliation: | a The State Key Laboratory on Crystal Materials, Shandong University, Jinan Shandong 250100, China b Department of Materials Science and Technology, ShanDong Institute of Light Industry, Jinan Shandong 250100, China |
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Abstract: | Nano-sized Ce-doped YAG phosphor particles were synthesized by a mixed solvothermal method using the stoichiometric amounts of inorganic aluminum and yttrium salts. The formation of YAG:Ce was investigated by means of XRD and TG-DTA. The purified YAG crystalline phases was obtained under moderate synthesis condition (300 °C and 10 MPa), this indicated that ethanol replaced part of water as solvent favoring the formation of YAG. TEM images showed that YAG:Ce phosphor particles were basically spherical in shape, well dispersed and a mean grain size about 60 nm. The particle absorbed excitation energy in the range 403-510 nm, and the maximum excitation wavelength was near 470 nm. The crystalline YAG:Ce showed broad emission peaks in the range 480-650 nm and had maximum intensity at 528 nm. The excitation and emission intensity increased with increasing the synthesis temperature from 280 to 300 °C, and get the maximum brightness at 300 °C. |
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Keywords: | A. Oxides C. Electron Microscopy C. X-ray diffraction D. Luminescence |
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