Author:
Guo Yanxing,Jiao Zhiwei,Cao Leigang,Li Sheng
Abstract
Abstract
Sr0.96Al2O4:Eu0.02, Dy0.02 green phosphors doped with La3+, Bi3+ and extra Dy3+ were successfully prepared by the solid-phase method. The crystal structure and luminescence properties of phosphors were characterized. The results showed that the doping of La3+ and Bi3+ and the continued increase of Dy3+ concentration in the SrAl2O4 lattice did not produce significant lattice distortion in the SrAl2O4 lattice, and the small amount of doping still maintained the presence of SrAl2O4. The photoluminescence intensity of both La3+ and Bi3+ doped samples showed an increasing and then decreasing trend within the doping amount, while the photoluminescence performance of Dy3+ doped samples did not show a decrease when increasing the same concentration of doping amount. The decay curves indicated that both La3+ and Bi3+ could decrease the afterglow time of SrAl2O4:Eu2+, Dy3+ phosphor, but increasing the concentration of Dy3+ effectively extends the afterglow time of SrAl2O4:Eu2+, Dy3+ phosphor.
Subject
Computer Science Applications,History,Education
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