Crystal Structure and Luminescence Properties of Ca8Mg3Al2Si7O28:Eu2+ for WLEDs

	Crystal Structure and Luminescence Properties of Ca8Mg3Al2Si7O28:Eu2+ for WLEDs
	Lv,Wenzhen ; Jia,Yongchao ; Zhao,Qi ; Jiao,Mengmeng ; Shao,Baiqi ; Lu,Wei ; You,Hongpeng
刊名	advanced optical materials
	2014
卷号	2 期号:2 页码:183-188
关键词	LIGHT-EMITTING-DIODES ENERGY-TRANSFER EARTH IONS PHOSPHORS EFFICIENCY EU2+ MELILITE
通讯作者	you,hp
英文摘要	in this paper, a novel green phosphor ca8mg3al2si7o28:eu2+ is synthesized via a conventional high-temperature solid-state reaction. the crystal structure of the phosphor is confirmed from the rietveld method. the obtained phosphor has a wide absorption band from the uv to the visible spectral region, ranging from 230 to 450 nm, which fits well with the characteristic emission of uv light-emitting diode (led) chips. upon excitation at 420 nm, the phosphor shows a bright and broad green color emission band with a maximum centered at 535 nm, which is attributed to the parity and spin allowed 5d-4f transition. the longer emission wavelength is caused by both the d orbital preferential orientation and the lowered symmetry of the eu2+ ions caused by the discrepancy of the tetrahedrons composed of mgo4, sio4, and alo4. additionally, the energy transfer mechanism among eu2+ ions is demonstrated via a dipole-dipole interaction by the luminescence spectra and the fluorescence decay analysis calculations on the basis of the inokuti-hirayama model. furthermore, the thermal stability of the phosphor is investigated in detail. these results suggest that the ca8mg3al2si7o28:eu2+ phosphor has great potential to be a green phosphor for white light emitting diodes (wleds).
收录类别	SCI
语种	英语
WOS记录号	WOS:000331045700017
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/57579]
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	Lv,Wenzhen,Jia,Yongchao,Zhao,Qi,et al. Crystal Structure and Luminescence Properties of Ca8Mg3Al2Si7O28:Eu2+ for WLEDs[J]. advanced optical materials,2014,2(2):183-188.
APA	Lv,Wenzhen.,Jia,Yongchao.,Zhao,Qi.,Jiao,Mengmeng.,Shao,Baiqi.,...&You,Hongpeng.(2014).Crystal Structure and Luminescence Properties of Ca8Mg3Al2Si7O28:Eu2+ for WLEDs.advanced optical materials,2(2),183-188.
MLA	Lv,Wenzhen,et al."Crystal Structure and Luminescence Properties of Ca8Mg3Al2Si7O28:Eu2+ for WLEDs".advanced optical materials 2.2(2014):183-188.