Electronic structure and photoluminescence properties of Eu(2+)-activated Ca(4)Si(2)O(7)F(2)

	Electronic structure and photoluminescence properties of Eu(2+)-activated Ca(4)Si(2)O(7)F(2)
	Jia YC ; Qiao H ; Guo N ; Zheng YH ; Yang M ; Huang YJ ; You HP
刊名	optical materials
	2011
卷号	33 期号:11 页码:1803-1807
关键词	LIGHT-EMITTING-DIODES LUMINESCENCE PROPERTIES PHOSPHOR CE3+
ISSN号	0925-3467
通讯作者	you hp
中文摘要	the blue-emitting phosphors ca((4-x))eu(x)si(2)o(7)f(2) (0 < x <= 0.05) have been prepared by solid-state reaction and the photoluminescence properties have been studied systematically. the electronic structure of calcium fluoride silicate ca(4)si(2)o(7)f(2) was calculated using the castep code. the calculation results of electronic structure show that ca(4)si(2)o(7)f(2) has an indirect band gap with 5 ev. the top of the valence band is dominated by o 2p and si 3p states, while the bottom of the conduction band is mainly composed of ca 3d states. under the 350 nm excitation, the obtained sample shows a broad emission band in the wavelength range of 400-500 nm with peaks of 413 nm and 460 nm from two different luminescence centers, respectively. the relative intensity of the two peaks changes with the alteration of the eu(2+) concentration. the strong excitation bands of the powder in the wavelength range of 200-420 nm are favorable properties for the application as lighting-emitting-diode conversion phosphor. (c) 2011 elsevier b.v. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2012-06-08
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44371]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Jia YC,Qiao H,Guo N,et al. Electronic structure and photoluminescence properties of Eu(2+)-activated Ca(4)Si(2)O(7)F(2)[J]. optical materials,2011,33(11):1803-1807.
APA	Jia YC.,Qiao H.,Guo N.,Zheng YH.,Yang M.,...&You HP.(2011).Electronic structure and photoluminescence properties of Eu(2+)-activated Ca(4)Si(2)O(7)F(2).optical materials,33(11),1803-1807.
MLA	Jia YC,et al."Electronic structure and photoluminescence properties of Eu(2+)-activated Ca(4)Si(2)O(7)F(2)".optical materials 33.11(2011):1803-1807.