Tuning oxygen vacancy photoluminescence in monoclinic Y2WO6 by selectively occupying yttrium sites using lanthanum

	Tuning oxygen vacancy photoluminescence in monoclinic Y2WO6 by selectively occupying yttrium sites using lanthanum
	Ding, BF; Han, C; Zheng LR(郑黎荣); Zheng, LR; Zhang, JY; Wang, RM; Tang, ZL
刊名	SCIENTIFIC REPORTS
	2015
卷号	5 页码:9443
英文摘要	The effect of isovalent lanthanum (La) doping on the monoclinic Y2WO6 photoluminescence was studied. Introducing the non-activated La3+ into Y2WO6 brings new excitation bands from violet to visible regions and strong near-infrared emission, while the bands position and intensity depend on the doping concentration. It is interesting to find that doping La3+ into Y2WO6 promotes the oxygen vacancy formation according to the first-principle calculation, Raman spectrum, and synchrotron radiation analysis. Through the Rietveld refinement and X-ray photoelectron spectroscopy results, La3+ is found to mainly occupy the Y2 (2f) site in low-concentration doped samples. With increasing doping concentration, the La3+ occupation number at the Y3 (4g) site increases faster than those at the Y1 (2e) and Y2 (2f) sites. When La3+ occupies different Y sites, the localized energy states caused by the oxygen vacancy pair change their position in the forbidden band, inducing the variation of the excitation and emission bands. This research proposes a feasible method to tune the oxygen vacancy emission, eliminating the challenge of precisely controlling the calcination atmosphere.
学科主题	Science & Technology - Other Topics
类目[WOS]	Multidisciplinary Sciences
收录类别	SCI
WOS记录号	WOS:000351937700001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228365]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Ding, BF,Han, C,Zheng LR,et al. Tuning oxygen vacancy photoluminescence in monoclinic Y2WO6 by selectively occupying yttrium sites using lanthanum[J]. SCIENTIFIC REPORTS,2015,5:9443.
APA	Ding, BF.,Han, C.,郑黎荣.,Zheng, LR.,Zhang, JY.,...&Tang, ZL.(2015).Tuning oxygen vacancy photoluminescence in monoclinic Y2WO6 by selectively occupying yttrium sites using lanthanum.SCIENTIFIC REPORTS,5,9443.
MLA	Ding, BF,et al."Tuning oxygen vacancy photoluminescence in monoclinic Y2WO6 by selectively occupying yttrium sites using lanthanum".SCIENTIFIC REPORTS 5(2015):9443.