Synthesis of Long Afterglow SrAl2O4 :Eu2+, Dy3+ Phosphor by Microemulsion Method
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：Chen Yongjie QIU Guanming Tian Yiguang Sun Yanbin XIAO Linjiu Geng Xiujuan
Key words：luminescence; europium and dysprosium doped strontium aluminate; microemulsion; long afterglow phosphor;
Abstract: Long afterglow SrAl2 O4: Eu2+, Dy3+ phosphor was synthesized by microemulsion method. The synthesized phosphor was characterized by XRD. XRD pattern indicates that the phosphor has monoclinic SrAl2 O4 crystal structre.The microstructure of the phosphor was investigated by SEM and TEM. The excitation spectrum, emission spectrum and afterglow decay curve were measured, the wide range of excitation wavelength indicated that the luminescent material could be excited by the light from ultraviolet ray to visible light, and the emission maximum was found to peak mainly at λem of 525 nm. The sample excited by ultraviolet visible light could emit bright green light.
Chen Yongjie1，QIU Guanming3，Tian Yiguang4，Sun Yanbin1，XIAO Linjiu1，Geng Xiujuan2
(1.School of Material and Metallurgy, Northeast University, Shenyang 110006, China;
2.School of Applied Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, China;
3.Department of Materials Science and Engineering, Changchun College of & Optics Fine Mechanics, Changchun 130022, China;
4.Department of Chemistry, Wenzhou University, Wenzhou 325027, China;
5.College of Materials Science and Engineering, Jilin University, Changchun 130026, China)
Abstract:Long afterglow SrAl2 O4: Eu2+, Dy3+ phosphor was synthesized by microemulsion method. The synthesized phosphor was characterized by XRD. XRD pattern indicates that the phosphor has monoclinic SrAl2 O4 crystal structre.The microstructure of the phosphor was investigated by SEM and TEM. The excitation spectrum, emission spectrum and afterglow decay curve were measured, the wide range of excitation wavelength indicated that the luminescent material could be excited by the light from ultraviolet ray to visible light, and the emission maximum was found to peak mainly at λem of 525 nm. The sample excited by ultraviolet visible light could emit bright green light.
Key words:luminescence; europium and dysprosium doped strontium aluminate; microemulsion; long afterglow phosphor;
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