An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs

doi:10.1016/j.dyepig.2018.02.036

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs
	Xiao, Y.; Hao, Z. D.; Zhang, L. L.; Wu, H.; Pan, G. H.; Zhang, X.; Zhang, J. H.
刊名	Dyes and Pigments
	2018
卷号	154 页码:121-127
关键词	Ce3+ Ba-2(Lu0.98La0.02)(5)B5O17 Single phase Blue phosphor Photoluminescence emitting phosphor energy-transfer luminescence properties crystal-structure rare-earth light ce3+ enhancement tb3+ gd Chemistry Engineering Materials Science
ISSN号	0143-7208
DOI	10.1016/j.dyepig.2018.02.036
英文摘要	We demonstrate a blue emitting Ba-2(Lu-0.La-98(0.02))(5)B5O17:Ce3+ (BLLB:Ce3+) phosphor prepared by high-temperature solid-state reaction. The pure phase of Ba2Lu5B5O17 is difficult to obtain. To stabilize the crystal structure of Ba2Lu5B5O17, the larger ion radius of La3+ was added to substitute Lu3+ in raw materials. It is found that pure-phase Ba2Lu5B5O17 is successfully obtained by adding 2% La3+. Upon 348 nm excitation, a luminescence internal quantum efficiency of BLLB:Ce3+ can reach as high as 92%, which is comparable to the commercial blue phosphor BaMgAl10O17:Eu2+. The BLLB:Ce3+ phosphor shows a blue emission band peaked at 443 nm with a main excitation band peaked at 348 nm. The dependence of luminescence intensity on Ce3+ concentration was studied. The maximal luminescence intensity was observed at 1% Ce3+, which gives a critical distance of 2.41 nm between two Ce3+ ions for luminescence quenching. The emission of the present phosphor is stable with increasing temperature up to its quenching temperature of 403 K. A white light emitting diode (WLED) was fabricated based on a near UV LED chip coated with a blend of the present blue phosphor, the commercial green (Ba,Sr)(2)SiO4:Eu2+ and red CaAlSiN3:Eu2+ phosphors. The WLED exhibited a low correlated color temperature of 4356 K with a high color rendering index of 93.2. These results suggest that BLLB:1% Ce3+ can be utilized as a blue phosphor in UV based WLEDs.
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/60900]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Xiao, Y.,Hao, Z. D.,Zhang, L. L.,et al. An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs[J]. Dyes and Pigments,2018,154:121-127.
APA	Xiao, Y..,Hao, Z. D..,Zhang, L. L..,Wu, H..,Pan, G. H..,...&Zhang, J. H..(2018).An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs.Dyes and Pigments,154,121-127.
MLA	Xiao, Y.,et al."An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs".Dyes and Pigments 154(2018):121-127.