Er3+Yb3+ codoped phosphor Ba3Y4O9 with intense red upconversion emission and optical temperature sensing behavior

doi:10.1039/c7tc05796b

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	Er3+Yb3+ codoped phosphor Ba3Y4O9 with intense red upconversion emission and optical temperature sensing behavior
	Wu, H.; Hao, Z. D.; Zhang, L. L.; Zhang, X.; Xiao, Y.; Pan, G. H.; Wu, H. J.; Luo, Y. S.; Zhang, L. G.; Zhang, J. H.
	2018
发表期刊	Journal of Materials Chemistry C
ISSN	2050-7526
卷号	6 期号:13 页码:3459-3467
摘要	The Ba3Y4O9 host matrix with a low cutoff phonon energy of 585 cm(-1) is first applied to upconversion (UC) luminescence (UCL) by codoping Er3+/Yb3+. The new phosphor shows an intense red UC emission which is 6.8-fold and 5.9-fold stronger than that of Y2O3 and beta-NaYF4, respectively, under 980 nm GaAs laser diode (LD) excitation at a low density. A broad absorption band centered at 976 nm is observed, meaning a high adaptability to the GaAs LD required in actual applications. The optical thermometry behaviors based on the temperature dependent fluorescence intensity ratios of thermally coupled green UC bands H-2(11/2) -> I-4(15/2) and S-4(3/2) -> I-4(15/2) as well as the thermally coupled red UC emission bands originating from the Stark sublevels of F-4(9/2) manifold have been explored. The results show that green emissions are suitable for temperatures above 350 K with the maximum sensitivity of 0.00248 K-1 at 563 K and the red emissions are appropriate for temperatures below 350 K with the maximum sensitivity of 0.00371 K-1 at 143 K in our experimental range, indicating their complementary temperature sensing ranges. Moreover, a new method is proposed for evaluating the radiative lifetime of the Er3+ F-4(9/2) state based on the analysis of photoluminescence (PL) spectra and fluorescence decay curves. The radiative lifetime of 879 mu s for the red emitting level in Ba3Y4O9 is achieved. Thereby, the emission efficiency of F-4(9/2) in the new UCP is a little higher than that in Y2O3. Our results imply that Ba3Y4O9:Er3+/Yb3+ is a promising UCP, which could be applied to wide scope optical thermometry using a dual-color scheme.
关键词	in-vivo excitation-energy la2o2s phosphor hollow spheres nanoparticles nanocrystals luminescence thermometry lanthanide core Materials Science Physics
DOI	10.1039/c7tc05796b
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60978
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	Wu, H.,Hao, Z. D.,Zhang, L. L.,et al. Er3+Yb3+ codoped phosphor Ba3Y4O9 with intense red upconversion emission and optical temperature sensing behavior[J]. Journal of Materials Chemistry C,2018,6(13):3459-3467.
APA	Wu, H..,Hao, Z. D..,Zhang, L. L..,Zhang, X..,Xiao, Y..,...&Zhang, J. H..(2018).Er3+Yb3+ codoped phosphor Ba3Y4O9 with intense red upconversion emission and optical temperature sensing behavior.Journal of Materials Chemistry C,6(13),3459-3467.
MLA	Wu, H.,et al."Er3+Yb3+ codoped phosphor Ba3Y4O9 with intense red upconversion emission and optical temperature sensing behavior".Journal of Materials Chemistry C 6.13(2018):3459-3467.

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