Abstract
SrAl2O4: (Eu2+, Dy3+) phosphor was prepared by solid state reaction. B2O5 as a flux was added in SrAl2O4:(Eu 2+, Dy3+) in order to accelerate a solid state reaction. In this paper, the effects of B2O3 on the crystal structure and the phosphorescent properties of the material have been evaluated. The synthesized phosphor exhibited a broad band emission spectrum peaking at 520 nm, and the spectrum peak showed little effect by the B2O3 contents. The maximum afterglow intensity of the SrAl2O4: (Eu2+, Dy3+) phosphor was obtained at the B2O3 content of 5%. Adding the B2O3 caused uniform distortion to the crystal structure of the phosphor and resulted in reducing the lengths of a and c axes and Β angle of the SrAl2O4 crystal. The uniform distortion was accompanied with crystal defects which can trap the holes generated by the excitation of Eu2+ ions. The afterglow characteristic of the SrAl2O4: (Eu2+, Dy3+) phosphor was thus enhanced.
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References
Cullity, B. D., “Elements of X-ray Diffraction”, Addison-Wesley Pub-lishing Company Inc., Reading, Massachusetts, U.S.A., 375 (1977).
Harada, I, Yao, S. and Ichimiya, A., “X-ray Diffraction Study of Fine Croie Particles Prepared by Gas Evaporation Technique”,J. Phys. Soc. Japan,48, 1625 (1981).
Hosono, H., Yamazaki, K. and Abe, Y., “Long Lasting Phosphorescence Properties of Eu-activated Strontium Aluminate Glasses”,J. Am. Ceram. Soc.,70, 867 (1987).
Ito, S., Banno, S., Suzuki, K. and Inagaki, M., “Solid Solubilities in the Alkaline-earth Metal Aluminates”,Yogyo-Kyokai-Shi,87, 344 (1979).
Katsumata, T., Nabae, T., Sasajima, K., Komuro, S. and Morikawa, T., “Effects of Composition on the Long Phosphorescent SrAl2O4: Eu2+, Dy3+ Phosphor Crystals”,J. Electrochem. Soc.,144, L243 (1997).
Kutty, T. R. N., Jarannathan, R. and Rao, R. P., “Luminescence of Eu2+ in Strontium Aluminates Prepared by the Hydrothermal Method”,Mat. Res. Bull.,25, 1355 (1990).
Matsuzawa, T., Aoki, Y., Takeuchi, N. and Murayama, Y., “A New Long Phosphorescent Phosphor with High Brightness, SrAl2O4: Eu2+, Dy3+”,J. Electrochem. Soc.,143, 2670 (1996).
Murayama, Y., “Long Phosphorescent Materials”,Ceramics Japan,32, 40 (1997).
Ohshima, K., Yatsuya, S. and Harada, J., “Characterization of Ultra Fine Palladium Particles with the Mean Size of 20 å by X-ray Diffrac-tion”,'J. Phys. Soc. Japan,50, 3071 (1981).
Takasaki, H., Tanabe, S. and Hanada, T., “Long-lasting Afterglow Char-acteristics of Eu, Dy Codoped SrO-Al2O3 Phosphor”,J. Ceram. Soc. Japan,104, 322 (1996).
Tanabe, S. and Hanada, T., “Appearance of Light-storage Rare Earth Aluminate Phosphors and Their Optical Properties”,New Ceramics,10, 27 (1996).
Victor, A., “Optical and Electrical Properties of SrAl2O4: Eu2+”,J. Elec-trochem. Soc.,118, 930 (1971).
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Yu, YT., Kim, BG. Effects of adding B2O3 as a flux on phosphorescent properties in synthesis of SrAl2O4: (Eu2+, DY3+ phosphor. Korean J. Chem. Eng. 20, 973–976 (2003). https://doi.org/10.1007/BF02697308
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DOI: https://doi.org/10.1007/BF02697308