Please use this identifier to cite or link to this item: https://doi.org/10.1557/jmr.2009.0258
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dc.titleEffects of size and surface on luminescence properties of submicron upconversion NaYF4:Yb, Er particles
dc.contributor.authorYuan, D.
dc.contributor.authorYi, G.S.
dc.contributor.authorChow, G.M.
dc.date.accessioned2014-10-07T09:48:50Z
dc.date.available2014-10-07T09:48:50Z
dc.date.issued2009-06
dc.identifier.citationYuan, D., Yi, G.S., Chow, G.M. (2009-06). Effects of size and surface on luminescence properties of submicron upconversion NaYF4:Yb, Er particles. Journal of Materials Research 24 (6) : 2042-2050. ScholarBank@NUS Repository. https://doi.org/10.1557/jmr.2009.0258
dc.identifier.issn08842914
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/86279
dc.description.abstractBulk NaYF4:Yb, Er particles (∼1.4 μm particle size) were synthesized using a hydro-thermal method. As-synthesized particles were subsequently ball milled to three average particle sizes, namely, ∼260 nm, 160 nm, and 100 nm. The x-ray diffraction pattern showed an hcp phase for as-synthesized and ball-milled particles with a predominant (100) peak. Room temperature emission spectra showed no size dependent peak shifts or peak broadening. The intensities of both green and red emissions decreased with increasing milling time. Segregation of Er ions was detected on the surfaces of milled particle that reduced the sensitizer-activator transition probability, resulting in decreased emission intensities. The green-to-red emission ratio was correlated to the surface enrichment of Er, which affected the cross-relaxation of luminescence dynamics. © 2009 Materials Research Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1557/jmr.2009.0258
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.description.doi10.1557/jmr.2009.0258
dc.description.sourcetitleJournal of Materials Research
dc.description.volume24
dc.description.issue6
dc.description.page2042-2050
dc.description.codenJMREE
dc.identifier.isiut000267207900020
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