Li+ ion doping: An approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles

	Li+ ion doping: An approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles
	Zhao C.; Kong X.; Liu X.; Tu L.; Wu F.; Zhang Y.; Liu K.; Zeng Q.; Zhang H.
	2013
发表期刊	Nanoscale
ISSN	ISBN/20403364
卷号	5 期号:17
摘要	The application of upconversion nanoparticles (UCNPs), especially in vivo, has so far been hampered by their relatively low upconversion efficiency. In this work, a strategy of Li+ doping was revisited with the aim of enhancing UV to blue UC luminescence of NaYF4:Yb3+, Tm3+ nanocrystals. We have demonstrated that the short wavelength UC emission bands were indeed significantly enhanced. Compared to lithium-free NaYF4:Yb3+, Tm3+, the UC emission intensities of 452 nm and 479 nm of the NPs co-doped with 7 mol% Li+ ions were increased by 8 and 5 times, respectively. The mechanism of the enhancement was discussed and the improvement of the nanoparticles' crystallinity and the distortion of the local symmetry around the Tm3+ ions, when the Li+ ions were introduced, were confirmed to be the origin of the improvement. 2013 The Royal Society of Chemistry.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40731
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhao C.,Kong X.,Liu X.,et al. Li+ ion doping: An approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles[J]. Nanoscale,2013,5(17).
APA	Zhao C..,Kong X..,Liu X..,Tu L..,Wu F..,...&Zhang H..(2013).Li+ ion doping: An approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles.Nanoscale,5(17).
MLA	Zhao C.,et al."Li+ ion doping: An approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles".Nanoscale 5.17(2013).

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