Femtosecond-pulse laser-ablation-induced synthesis and improved emission properties of ultrafine Y2O3:Er3+, Yb3+ nanoparticles with reduced nonradiative relaxation

	Femtosecond-pulse laser-ablation-induced synthesis and improved emission properties of ultrafine Y2O3:Er3+, Yb3+ nanoparticles with reduced nonradiative relaxation
	Zheng, C. B.; G. L. Yang; K. Zhang; C. R. Wang; H. L. Wang; F. Chen and Y. He
	2015
发表期刊	Journal of Alloys and Compounds
卷号	648 页码:838-844
摘要	Nanomaterials with effective visible upconversion emission have received special attention due to the potential application in the fields including biological labeling, imaging, and photodynamic therapy. The main focus of this work is the improvement of the upconversion emission properties, which is enhanced emission intensity and prolonged decay time, by reducing nonradiative relaxation assisted by high energy phonon. Y2O3:Er3+, Yb3+ nanoparticles (considerably < 50 nm) were directly prepared through femtosecond-pulse laser ablation conducted on the corresponding oxide mixture. It was observed that the number of carbonate and hydroxyl groups remaining in the nanoparticles was decreased. The upconversion and infrared emission properties of the particles were investigated using 976-nm continuous-wave laser radiation, and it was found that the relative red-to-green emission intensity decreased. The samples also exhibited higher integral intensity and reduced power dependence on the excitation intensity, which indicates a more effective upconversion process. The decay time for upconversion emission was lengthened, and for the first time (to the best of our knowledge), infrared emission at 1550 nm was almost suppressed. As a result of the elimination of the carbonate and hydroxyl groups, nonradiative relaxation assisted by high-energy phonons was reduced, thereby increasing the decay time and upconversion emission and decreasing the infrared emission. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55532
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zheng, C. B.,G. L. Yang,K. Zhang,et al. Femtosecond-pulse laser-ablation-induced synthesis and improved emission properties of ultrafine Y2O3:Er3+, Yb3+ nanoparticles with reduced nonradiative relaxation[J]. Journal of Alloys and Compounds,2015,648:838-844.
APA	Zheng, C. B.,G. L. Yang,K. Zhang,C. R. Wang,H. L. Wang,&F. Chen and Y. He.(2015).Femtosecond-pulse laser-ablation-induced synthesis and improved emission properties of ultrafine Y2O3:Er3+, Yb3+ nanoparticles with reduced nonradiative relaxation.Journal of Alloys and Compounds,648,838-844.
MLA	Zheng, C. B.,et al."Femtosecond-pulse laser-ablation-induced synthesis and improved emission properties of ultrafine Y2O3:Er3+, Yb3+ nanoparticles with reduced nonradiative relaxation".Journal of Alloys and Compounds 648(2015):838-844.

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