Luminescence properties of Lu sub(3)M sub(5)O sub(12):Eu super(3+) (M = Al, Ga) and effects of Bi super(3+) co-dopant

• Published in: Journal of sol-gel science and technology 2015-10, Vol.76 (1), p.43-49
• Main Authors: Zhu, Xian-zhong, Chu, Cheng-lin, Chu, Paul K
• Format: Article
• Language: English
• Subjects: Agglomeration; Crystal structure; Diffraction; Emission; Excitation spectra; Luminescence; Phosphors; Quenching
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-015-3748-7

The Eu super(3+)-doped and Eu super(3+), Bi super(3+) co-doped Lu sub(3)M sub(5)O sub(12) (LuMG where M = Al, Ga) phosphors are synthesized by spray pyrolysis, and the crystal structure, micromorphology, luminescence properties and effects of Bi super(3+) co-dopant are investigated. X-ray diffraction reveals that the crystal structures of the matrices do not change after partial replacement of Lu super(3+) by Eu super(3+) and Bi super(3+). The phosphors exhibit the same spherical micromorphology without agglomeration and particle size distribution with a typical diameter of about 0.7 mu m. The emission and excitation spectra show transitions associated with the Eu super(3+) 4f configurations. super(7)F sub(1) energy level splitting of Eu super(3+) in Lu sub(3)Al sub(5)O sub(12):Eu and stronger luminescence of Lu sub(3)Ga sub(5)O sub(12):Eu are observed, and the quenching concentrations of Eu super(3+) in Lu sub(3)Al sub(5)O sub(12):Eu and Lu sub(3)Ga sub(5)O sub(12):Eu are 6 and 10 mol% with respect to Lu super(3+), respectively. Introduction of Bi super(3+) enhances the emission of Eu super(3+) accompanied by the transition emission of Bi super(3+). Graphical Abstract https://static-content.springer.com/image/art%3A10.1007%2Fs10971-0 1 5-3748-7/MediaObjects/10971_2015_3748_Figa_HTML.gif