Synthesis and luminescent properties of Ln3+ (Ln3+ = Eu3+, Dy3+) -doped Bi2ZnB2O7 phosphors
- 240 Downloads
The new phosphors Bi2ZnB2O7: Ln3+ (Ln3+ = Eu3+, Dy3+) were synthesized by solid-state reaction technique. The obtained phosphors were investigated by means of X-ray powder diffraction (XRD), photoluminescence excitation and emission spectra with the aim of enhancing the fundamental knowledge about the luminescent properties of Eu3+ and Dy3+ ions in the Bi2ZnB2O7 host lattice. XRD analysis shows that all these compounds are of a single phase of Bi2ZnB2O7. The excitation and emission spectra of Bi2ZnB2O7: Ln3+ (Ln3+ = Eu3+, Dy3+) at room temperature show the typical 4f-4f transitions of Eu3+ and Dy3+, respectively. The hypersensitive transitions of 5D0→7F2 (Eu3+) and 4F9/2→6H13/2 (Dy3+) are relatively higher than those of the insensitive transitions in Bi2ZnB2O7. It is conceivable that the Bi2ZnB2O7 structure provides asymmetry sites for activators (Eu3+, Dy3+). The optimum concentrations of Eu3+ and Dy3+ ions in Bi2ZnB2O7 phosphors are both x = 0.05.
Keywordsphosphor Bi2ZnB2O7 luminescent properties concentration quenching
Unable to display preview. Download preview PDF.
- Blasse G., and Grabmaier B.C., Luminescent Materials, Edited by Springer-Verlag, Berlin, Heidelberg, 1994.Google Scholar
- Liebertz J., Wostrack A., Wirth V., Hellwig H., Held P., and Bohatý L., Das azentrische Wismutzinkborat Bi2Zn2B2O7: Kristallstruktur und Züchtung sowie lineare und nichtlineare optische Eigenschaften, Z Kristallogr Suppl., 1997, 12(1): 85.Google Scholar
- Su Q., Chemistry of Rare Earths, Henan Science and Technology Publishing Company, Zhengzhou, 1996.Google Scholar