Size and Concentration Effects on the Photoluminescence of La2O2S:Eu3+ Nanocrystals

	Size and Concentration Effects on the Photoluminescence of La2O2S:Eu3+ Nanocrystals
其他题名	论文其他题名
	Dai Q. L.; Song H. W.; Wang M. Y.; Bai X.; Dong B.; Qin R. F.; Qu X. S.; Zhang H.
	2008
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	112 期号:49 页码:19399-19404
摘要	The effects of size and europium concentration on photoluminescence properties of La2O2S: Eu3+ nanocrystals (similar to 20 nm) and the corresponding bulk were studied. The results indicate that in nanocrystals, the absorption edge largely shifted to blue in comparison to the bulk, which was mainly attributed to the variation of phonon-excitation relaxation. Two excitation bands were observed, located at similar to 250 and similar to 330 nm, respectively, corresponding to the charge transfer (CT) transitions of Eu-O and Eu-S. Relative to the CT transition of Eu-O, that of Eu-S increased greatly with europium concentration. The dependence of photoluminescence intensity on concentration showed that in the nanocrystals and the bulk, Eu3+ ions had two different quenching mechanisms, respectively, the exchange interaction and electric dipole-dipole interaction.
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/181722/26411
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Dai Q. L.,Song H. W.,Wang M. Y.,et al. Size and Concentration Effects on the Photoluminescence of La2O2S:Eu3+ Nanocrystals[J]. Journal of Physical Chemistry C,2008,112(49):19399-19404.
APA	Dai Q. L..,Song H. W..,Wang M. Y..,Bai X..,Dong B..,...&Zhang H..(2008).Size and Concentration Effects on the Photoluminescence of La2O2S:Eu3+ Nanocrystals.Journal of Physical Chemistry C,112(49),19399-19404.
MLA	Dai Q. L.,et al."Size and Concentration Effects on the Photoluminescence of La2O2S:Eu3+ Nanocrystals".Journal of Physical Chemistry C 112.49(2008):19399-19404.

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