中国科学院长春光学精密机械与物理研究所

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	Low-density superhard materials: computational study of Li-inserted B-substituted closo-carboranes LiBC11 and Li2B2C10
	Feng, X. L.; X. Y. Zhang; H. Y. Liu; X. Qu; S. A. T. Redfern; J. S. Tse and Q. Li
	2016
发表期刊	Rsc Advances
卷号	6期号:58
摘要	CaO:Ce3+, Mn2+ phosphors with various Mn2+ concentrations were synthesized by a solid state reaction method. Efficient energy transfer from Ce3+ to Mn2+ was observed and it allows the emission color of CaO: Ce3+, Mn2+ to be continuously tuned from yellow (contributed by Ce3+) to red (by Mn2+) with an increase in Mn2+ concentration and upon blue light excitation. The red emission becomes dominant when the Mn2+ concentration is >= 0.014 with an energy transfer efficiency higher than 87% which can reach as high as 94% for a Mn2+ concentration of only 0.02. A critical distance of 10.5 angstrom for thee(3+)-Mn2+ energy transfer was determined. A faster decrease of Ce3+ luminescence intensity in comparison with its lifetime was observed on increasing the Mn2+ concentration. The analysis of this feature reveals that the Ce3+ excitation energy can be completely transferred to Mn2+ if the Ce3+-Mn2+ distance is shorter than 7.6 angstrom. warm white LED was fabricated through integrating an InGaN blue LED chip and a blend of two phosphors (YAG: Ce3+ yellow phosphor and CaO: 0.007Ce(3+), 0.014Mn(2+) red phosphor) into a single package, which has CIE chromaticity coordinates of (x = 0.37, y = 0.35), a correlated color temperature of 3973 K and a color rendering index of 83.1. The results indicate that CaO:Ce3+, Mn2+ may serve as a potential red phosphor for blue LED based warm white LEDs.
文章类型	期刊
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56915
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Feng, X. L.,X. Y. Zhang,H. Y. Liu,et al. Low-density superhard materials: computational study of Li-inserted B-substituted closo-carboranes LiBC11 and Li2B2C10[J]. Rsc Advances,2016,6(58).
APA	Feng, X. L.,X. Y. Zhang,H. Y. Liu,X. Qu,S. A. T. Redfern,&J. S. Tse and Q. Li.(2016).Low-density superhard materials: computational study of Li-inserted B-substituted closo-carboranes LiBC11 and Li2B2C10.Rsc Advances,6(58).
MLA	Feng, X. L.,et al."Low-density superhard materials: computational study of Li-inserted B-substituted closo-carboranes LiBC11 and Li2B2C10".Rsc Advances 6.58(2016).

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