Structure and Luminescence Properties of New Green-Emitting Phosphor BaAl12O19:Tb

概要

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New green-emitting BaAl12O19:Tb phosphors were prepared by using the sol–gel method, and their structure and luminescence property were characterized by X-ray diffraction (XRD) analysis and fluorescence spectrometry. The results of XRD analysis revealed that a Ba1-xAl12O19:Tbx crystal structure was obtained at 1300 °C and Tb3+ ions substituted Ba2+ ions into the BaAl12O19 phase in the ion range $x=0.005--0.05$. The excitation peak of BaAl12O19:Tb was a wide band at approximately 240 nm, originating from the $4 f^{8}$–$4 f^{7}5d^{1}$ transition of Tb3+. The emission spectrum consisted of eight emission peaks, originating from the $^{5}D_{3}$–$^{7}F_{i}$ ($i=6,5,4,3$) and $^{5}D_{4}$–$^{7}F_{j}$ ($ j=6,5,4,3$) transitions of Tb3+. The emission intensity of BaAl12O19:Tb phosphors at 543 nm was strongest when the phosphors were crystallized at 1300 °C for 2 h, and the content of Tb3+ was 2 mol %.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2007-09-15