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Effects of Flux on the Synthesis and the Luminescence of Lu3Al5O12:Ce3 + Phosphors

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Ce3+-doped Lu3Al5O12(LuAG:Ce3+) powder was synthesized using a solid state reaction method in the presence of metal fluoride flux. AlF3 flux was used alone and in combination with BaF2 and NaF. Crystallographic data were determined by Rietveld refinement. The photoluminescence (PL) excitation spectra consisted of strong and weak bands owing to the ground state doublet (2F7/2 and 2F5/ 2) of the Ce3+ ions. Asymmetrical emission spectra were observed in the green wavelength region, which resulted from two overlapping subbands that originated from the 2D → 2F5/2, 2F7/2 transitions of the Ce3+ ions. The addition of flux affected particle morphologies, crystal structures, and the incorporation of Ce3+ ions into the host lattice, leading to a change in PL properties. The emission intensity of powder synthesized using AlF3 in combination with NaF was higher than that for powder synthesized using AlF3 alone. A transition from a red- to blue-shift of the dominant emission wavelengths was observed. This behavior was explained by considering the change in the lattice constant and the incorporation of fluorine ions into the host lattice.
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Document Type: Research Article

Publication date: April 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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