Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5398967 | Journal of Luminescence | 2015 | 4 Pages |
Abstract
Luminescent materials composed of Sr3â3(m+n)/2BimEunAlO4F (m=0.001-0.05, n=0-0.1) were prepared by the solid-state reaction method. The excitation and emission spectra of Sr3â3m/2BimAlO4F (m=0.001-0.05) were investigated using photoluminescence spectroscopy; broad-band emission peaks owing to the 3P1â1S0 transitions of the Bi3+ activator were observed centered near 427Â nm. Critical emission quenching, as a function of Bi3+ content in Sr3â3m/2BimAlO4F, was observed at relatively low concentrations of the activator. The quantum efficiency of Sr2.985Bi0.01AlO4F in comparison with sodium salicylate was explored. When Sr2+ ions in the oxyfluoride host were replaced by Bi3+ and Eu3+ ions, the effective s2-sp and f-f transitions of the Bi3+ and Eu3+ ions, respectively, were simultaneously observed. The diverse excitation and emission photoluminescence spectra and color CIE coordinates, as well as the blue to orange-red emission, obtained using Sr3â3(m+n)/2BimEunAlO4F (m=0-0.05, n=0-0.1) phosphors are also discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Minhee Noh, So-Hye Cho, Sangmoon Park,