Article ID Journal Published Year Pages File Type
5398448 Journal of Luminescence 2016 7 Pages PDF
Abstract
Single-phase and near-ultraviolet (NUV)-excitable materials composed of Y7(1−2(p+q)/3)Eu7pMn7qO6F9 (p =0.01, 0.05, q =0-0.1) were prepared via a flux-assisted method in reducing atmosphere. X-ray diffraction patterns of the obtained phosphors were examined to index the peak positions. After doping the host structure with Eu2+ and Mn2+ emitters, blue to intense orange emission lights that were observed in the photoluminescence spectra under NUV excitation were monitored. The dependence of the luminescent intensity of the Mn2+ co-doped (q =0.005-0.1) host lattices on the fixed Eu2+ content (p =0.01, 0.05) is also investigated. Co-doping Mn2+ into the Eu2+-doped host structure enabled green and orange Mn2+ transitions in different sites of Y7O6F9 host lattice was attained. Co-doping Mn2+ into the Eu2+-doped host structure enabled clear energy transfer from Eu2+ to Mn2+; this energy transfer mechanism is discussed. With these phosphors, the desired CIE values including emissions from the blue to orange regions of the spectra were achieved.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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