Blue-Emitting K2Al2B2O7:Eu2+ Phosphor with High Thermal Stability and High Color Purity for Near-UV-Pumped White Light-Emitting Diodes

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	Blue-Emitting K2Al2B2O7:Eu2+ Phosphor with High Thermal Stability and High Color Purity for Near-UV-Pumped White Light-Emitting Diodes
	Xiao, W. G.; X. Zhang; Z. D. Hao; G. H. Pan; Y. S. Luo; L. G. Zhang and J. H. Zhang
刊名	Inorganic Chemistry
	2015
卷号	54 期号:7 页码:3189-3195
英文摘要	Novel blue-emitting K2Al2B2O7:Eu2+ (KAB:Eu2+) phosphor was synthesized by solid state reaction. The crystal structural and photoluminescence (PL) properties of KAB:Eu2+ phosphor, as well as its thermal properties of the photoluminescence, were investigated. The KAB:Eu2+ phosphor exhibits broad excitation spectra ranging from 230 to 420 nm, and an intense asymmetric blue emission band centered at 450 nm under lambda(ex) = 325 nm. Two different Eu2+ emission centers in KAB:Eu2+ phosphor were confirmed via their fluorescence decay lifetimes. The optimal concentration of Eu2+ ions in K2-xEuxAl2B2O7 was determined to be x = 0.04 (2 mol %), and the corresponding concentration quenching mechanism was verified to be the electric dipoledipole interactions. The PL intensity of the nonoptimized KAB:0.04Eu(2+) phosphor was measured to be similar to 58% that of the commercial blue-emitting BaMgAl10O17:Eu2+ phosphor, and this phosphor has high color purity with the CIE coordinate (0.147, 0.051). When heated up to 150 degrees C, the KAB:0.04Eu(2+) phosphor still has 82% of the initial PL intensity at room temperature, indicating its high thermal stability. These results suggest that the KAB:Eu2+ is a promising candidate as a blue-emitting n-UV convertible phosphor for application in white light emitting diodes.
收录类别	SCI
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/55483]
专题	长春光学精密机械与物理研究所_中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xiao, W. G.,X. Zhang,Z. D. Hao,et al. Blue-Emitting K2Al2B2O7:Eu2+ Phosphor with High Thermal Stability and High Color Purity for Near-UV-Pumped White Light-Emitting Diodes[J]. Inorganic Chemistry,2015,54(7):3189-3195.
APA	Xiao, W. G.,X. Zhang,Z. D. Hao,G. H. Pan,Y. S. Luo,&L. G. Zhang and J. H. Zhang.(2015).Blue-Emitting K2Al2B2O7:Eu2+ Phosphor with High Thermal Stability and High Color Purity for Near-UV-Pumped White Light-Emitting Diodes.Inorganic Chemistry,54(7),3189-3195.
MLA	Xiao, W. G.,et al."Blue-Emitting K2Al2B2O7:Eu2+ Phosphor with High Thermal Stability and High Color Purity for Near-UV-Pumped White Light-Emitting Diodes".Inorganic Chemistry 54.7(2015):3189-3195.