Processing and Characterization of Phosphorescent Strontium Aluminate Powders

Abstract:

We have demonstrated the synthesis of lanthanide co-doped nominally SrAl2O4 powders that phosphoresce over long durations. Previous work has reported that the color of phosphorescence depends on the nature of the alkaline earth cation, and that extended phosphorescence in Eu2+ and other lanthanide co-doped MAl2O4 (M= Sr, Ca, Ba) systems occurred with boron incorporation. To gain further insight into the mechanism of extended phosphorescence persistence, we investigated the incorporation of other glass-forming cations, Si and P. The Eu2+ and Dy3+ co-doped SrAl2O4 (SAED) powders were processed by solution polymerization and annealed at 1000oC under a reducing atmosphere. X-ray diffraction spectra revealed that these powders were multiphase. To characterize the optical properties, photoluminescence spectra and phosphorescence persistence curves were measured using a 325-nm wavelength excitation source. We report that the addition of B2O3 alone to SAED powders extended the persistence, while decreasing the luminosity, but more interestingly, the addition of B2O3 along with other glass formers dramatically increased the excitation luminosity.

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 2627-2632
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.2627
• Online since: October 2006
• Authors: Cleva W. Ow-Yang, Gözde Töral, Zehra Saraç, Mehmet Ali Gülgün
• Keywords: Lanthanide Co-Doped X-Aluminates, Phosphor, Phosphorescence Time, Photoluminescence (PL)

References

[1] Palilla, F.C., Levine, A.K., Tomkus, M.R., Journal of Electrochemistry, 1968. 115(6): pp.642-644.

[2] Murayama, Y., Takeuchi, N., Aoki, Y., Matsuzawa, T., U.S. Patent No. 5, 424, 006, (1995).

[3] Matsuzawa, T., Aoki, Y., Takeuchi, N., Murayama, Y., Journal of the Electrochemical Society, 1996. 143(8): pp.2670-2673.

[4] Abbruscato, V., Journal of Electrochemistry, 1971. 118(6): pp.930-932.

[5] Nag, A., Kutty, T.R.N., Materials Research Bulletin, 2004. 39: pp.331-342.

[6] Niitykoski, J., Aitasalo, T., Holsa, J., Junger, H., Lastusaari, M., Parkkinen, M., Tukia, M., Journal of Alloys and Compounds, 2004. 374: pp.108-111.

DOI: 10.1016/j.jallcom.2003.11.078

[7] Clabau, F., Rocquefelte, X., Jobic, S., Deniard, P., Whangbo, M-H., Garcia, A., Le Mercier, T., Chemistry of Materials, 2005. 17: pp.3904-3912.

DOI: 10.1021/cm050763r

[8] Chang, C., Mao, D., Shen, J., Feng, C., Journal of Alloys and Compounds, 2003. 348: pp.224-230.

[9] Gülgün, M.A., Popoola, O.O., Kriven, W.M., Journal of American Ceramic Society, 1994, 77: pp.531-539.

[10] Lessing, P.A., American Ceramic Society Bulletin, 1989, 68: pp.1002-1007.