Long afterglow luminescence mechanism of SrAl2O4-based phosphor by the thermoluminescence and positron annihilation method

	Long afterglow luminescence mechanism of SrAl2O4-based phosphor by the thermoluminescence and positron annihilation method
	Lin, YH; Nan, CW; Zhang, ZT; Wang, YT; Wang YT(王雨田)
刊名	JOURNAL OF INORGANIC MATERIALS
	2004
卷号	19 期号:1 页码:#REF!
关键词	thermoluminescence positron annihilation long afterglow trap level
其他题名	热释发光一正电子湮灭法研究SrAl2O4基磷光体长余辉发光机制
通讯作者	Lin, YH (reprint author), Tsing Hua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China.
英文摘要	Long afterglow SrAl2O4:Eu,Dy phosphor was prepared by the traditional ceramic synthesis method, and investigated its luminescent mechanism and properties by the thermoluminescence and positron annihilation method. The results indicate that Eu2+ ions act luminescent centers and Dy3+ ions as trap levels. The positron annihilation experiment reveals that traps with negative charge exist in the Sr0.94Al2O4: Eu-0.02 and Sr0.94Al2O4:Eu-0.02, Dy-0.04, the Dy3+ ions enter the Sr2+ sites, and produce some Sr2+ vacancies simultaneously. The thermoluminescence curves imply that the, depth of trap level is about 0.95eV while doped Eu ions simply, and 0.51eV while co-doped Dy3+ in the SrAl2O4 host. As for the long afterglow luminescence mechanism, the trapped holes released from the trap levels are recombined with electrons accompanying with the luminescence, which result in the long afterglow. Due to the different depths of trap levels, the afterglow properties of phosphors vary greatly.
学科主题	Materials Science
类目[WOS]	Materials Science, Ceramics
收录类别	SCI
WOS记录号	WOS:000188667100033
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/226900]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Lin, YH,Nan, CW,Zhang, ZT,et al. Long afterglow luminescence mechanism of SrAl2O4-based phosphor by the thermoluminescence and positron annihilation method[J]. JOURNAL OF INORGANIC MATERIALS,2004,19(1):#REF!.
APA	Lin, YH,Nan, CW,Zhang, ZT,Wang, YT,&王雨田.(2004).Long afterglow luminescence mechanism of SrAl2O4-based phosphor by the thermoluminescence and positron annihilation method.JOURNAL OF INORGANIC MATERIALS,19(1),#REF!.
MLA	Lin, YH,et al."Long afterglow luminescence mechanism of SrAl2O4-based phosphor by the thermoluminescence and positron annihilation method".JOURNAL OF INORGANIC MATERIALS 19.1(2004):#REF!.