An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission

doi:10.1039/c7tc05614a

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	An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission
	Xiao, Y.; Hao, Z. D.; Zhang, L. L.; Zhang, X.; Pan, G. H.; Wu, H.; Wu, H. J.; Luo, Y. S.; Zhang, J. H.
	2018
Source Publication	Journal of Materials Chemistry C
ISSN	2050-7526
Volume	6 Issue:22 Pages:5984-5991
Abstract	Green phosphors codoped with Ce3+ and Tb3+ have been studied extensively for application in UV-based white LEDs, but only few of them show both high luminescence efficiency and thermal stability. This study reports a new green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 prepared by a solid-state reaction. Emission color tuning from blue to green was studied as a function of Tb3+ concentration under UV excitation and well-described based on energy transfer from Ce3+ to Tb3+. The Tb3+ emission endowed the green phosphor with a high quantum yield of 86%, and a high thermal stability over the 303-483 K range was achieved. A model has been proposed to explain a general phenomenon observed in Ce3+ and Tb3+-codoped phosphors that Tb3+ emission is thermally more stable than the Ce3+ emission. A relationship between the temperature dependencies of Tb3+ and Ce3+ emissions was obtained in connection with room temperature energy transfer efficiency. The thermally stable Tb3+ emission was wellpredicated using the obtained relationship. The new phosphor was employed for fabricating a UV-based white LED. A high color-rendering index of 91.4 at a low correlated color temperature of 3809 K is obtained, indicating promising application of Ba2Lu5B5O17: Ce3+, Tb3+ in solid-state lighting.
Keyword	blue-emitting phosphor color tunable emission energy-transfer white-light luminescence properties tb3+ photoluminescence state relaxation diodes Materials Science Physics
DOI	10.1039/c7tc05614a
Indexed By	SCI ; EI
Citation statistics
Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/60901
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	Xiao, Y.,Hao, Z. D.,Zhang, L. L.,et al. An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission[J]. Journal of Materials Chemistry C,2018,6(22):5984-5991.
APA	Xiao, Y..,Hao, Z. D..,Zhang, L. L..,Zhang, X..,Pan, G. H..,...&Zhang, J. H..(2018).An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission.Journal of Materials Chemistry C,6(22),5984-5991.
MLA	Xiao, Y.,et al."An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission".Journal of Materials Chemistry C 6.22(2018):5984-5991.

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中国科学院长春光学精密机械与物理研究所