Rapid microwave reflux process for the synthesis of pure hexagonal NaYF4:Yb3+,Ln(3+),Bi3+ (Ln(3+) = Er3+, Tm3+, Ho3+) and its enhanced UC luminescence

	Rapid microwave reflux process for the synthesis of pure hexagonal NaYF4:Yb3+,Ln(3+),Bi3+ (Ln(3+) = Er3+, Tm3+, Ho3+) and its enhanced UC luminescence
	Niu N ; He F ; Gai SL ; Li CX ; Zhang X ; Huang SH ; Yang PP
刊名	journal of materials chemistry
	2012
卷号	22 期号:40 页码:21613-21623
关键词	UP-CONVERSION LUMINESCENCE DOPED NAYF4 NANOCRYSTALS ASSISTED SYNTHESIS ENERGY-TRANSFER OPTICAL-PROPERTIES SOLID-STATE THIN-FILMS LI+ IONS NANOPARTICLES EMISSION
ISSN号	0959-9428
通讯作者	yang pp
中文摘要	pure hexagonal nayf4:yb3+,ln(3+) (ln(3+) = er3+, tm3+, ho3+) crystals were obtained for the first time through a facile microwave (mw) reflux method at relatively low temperature (160 degrees c) and atmospheric pressure within only 50 min. by controllably increasing the nh4f content in the ethylene glycol (eg) solvent, the phase of as-prepared nayf4:yb3+,ln(3+) gradually transforms from cubic to hexagonal. correspondingly, the up-conversion (uc) emission intensities of hexagonal nayf4:yb3+,ln(3+) (ln(3+) = er3+, tm3+, ho3+) are increased by 10-12 times compared to those of the cubic phase. a possible growth mechanism for the phase transformation under these mw conditions has been proposed. moreover, for the first time, we introduced bi3+ ion into beta-nayf4:20%yb3+,2% ln(3+) crystals. as expected, the uc emission of beta-nayf4:yb3+,ln(3+),bi3+ are about 10-40 times higher than those of bi3+ free samples. it is found that tri-doping of bi3+ doesn't change the basic emission of ln(3+) ions. xrd results gives evidence that tri-doping of bi3+ ions can tailor the local crystal field and dissociate the yb3+ and ln(3+) ion clusters, which is the main reason for the uc enhancement. this designed mw reflux method for the synthesis of beta-nayf4:20%yb3+,2%ln(3+) can be applied to prepare other rare earth fluorides. the markedly enhanced uc luminescence through bi3+ doping also provides an effective way to gain very bright uc emission.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000309852400038
公开日期	2013-04-22
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/47885]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Niu N,He F,Gai SL,et al. Rapid microwave reflux process for the synthesis of pure hexagonal NaYF4:Yb3+,Ln(3+),Bi3+ (Ln(3+) = Er3+, Tm3+, Ho3+) and its enhanced UC luminescence[J]. journal of materials chemistry,2012,22(40):21613-21623.
APA	Niu N.,He F.,Gai SL.,Li CX.,Zhang X.,...&Yang PP.(2012).Rapid microwave reflux process for the synthesis of pure hexagonal NaYF4:Yb3+,Ln(3+),Bi3+ (Ln(3+) = Er3+, Tm3+, Ho3+) and its enhanced UC luminescence.journal of materials chemistry,22(40),21613-21623.
MLA	Niu N,et al."Rapid microwave reflux process for the synthesis of pure hexagonal NaYF4:Yb3+,Ln(3+),Bi3+ (Ln(3+) = Er3+, Tm3+, Ho3+) and its enhanced UC luminescence".journal of materials chemistry 22.40(2012):21613-21623.