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Synthesis of ultra-small BaLuF5:Yb3+,Er3+atBaLuF5:Yb3+ active-core-active-shell nanoparticles with enhanced up-conversion and down-conversion luminescence by a layer-by-layer strategy
Zhang Y.1; Liu X.1; Lang Y.1; Yuan Z.2; Zhao D.1; Qin G.1; Qin W.1
2015-03-07
Source PublicationJournal of Materials Chemistry C
ISSN20507526 20507534
Volume3Issue:9Pages:2045-2053
Abstract

Ultra-small luminescent nanoparticles (NPs) are quite desirable for optoelectronic and biomedical applications. However, it is still a challenge to synthesize ultra-small NPs with high brightness owing to non-radiative energy losses caused by the surface defects as well as from vibrational deactivation ascribed to solvent molecules and ligands absorbed on the NPs. In this paper, we reported a strategy to improve up- and down-conversion luminescence of ultra-small BaLuF:Yb,Er NPs by using multi-layer active-shells (containing Yb). Sub-10 nm BaLuF:Yb,Erat(X-shell, X = 1-5)BaLuF:Yb NPs were synthesized via a high boiling solvent process through a layer-by-layer strategy. Up- and down-conversion fluorescence spectra of the NPs were recorded and analyzed by using a 980 nm laser diode as the excitation source. In comparison with optical properties of BaLuF:Yb,Er NPs, the intensities of up- (∼545 nm) and down-conversion (∼1530 nm) fluorescence were enhanced by 52 and 9.8 times after coating 5-layer active-shells (BaLuF:Yb) on the BaLuF:Yb,Er NPs, respectively. In addition, the intensities of up- and down-conversion fluorescence of the BaLuF:Yb,Er NPs with multi-layer active-shells were 1.3 and 1.1 times larger than those of the BaLuF:Yb,Er NPs with a one thick-layer active shell, respectively. These results showed that multi-layer active-shells could be used to not only suppress surface quenching but also transfer the pump light to the core region efficiently through Yb ions inside the active-shells.

DOI10.1039/c4tc02541e
URLView the original
Indexed BySCI
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000349759000021
Fulltext Access
Citation statistics
Cited Times [WOS]:27   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Health Sciences
Affiliation1.Jilin University
2.Universidade de Macau
Recommended Citation
GB/T 7714
Zhang Y.,Liu X.,Lang Y.,et al. Synthesis of ultra-small BaLuF5:Yb3+,Er3+atBaLuF5:Yb3+ active-core-active-shell nanoparticles with enhanced up-conversion and down-conversion luminescence by a layer-by-layer strategy[J]. Journal of Materials Chemistry C,2015,3(9):2045-2053.
APA Zhang Y..,Liu X..,Lang Y..,Yuan Z..,Zhao D..,...&Qin W..(2015).Synthesis of ultra-small BaLuF5:Yb3+,Er3+atBaLuF5:Yb3+ active-core-active-shell nanoparticles with enhanced up-conversion and down-conversion luminescence by a layer-by-layer strategy.Journal of Materials Chemistry C,3(9),2045-2053.
MLA Zhang Y.,et al."Synthesis of ultra-small BaLuF5:Yb3+,Er3+atBaLuF5:Yb3+ active-core-active-shell nanoparticles with enhanced up-conversion and down-conversion luminescence by a layer-by-layer strategy".Journal of Materials Chemistry C 3.9(2015):2045-2053.
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