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Author Marciniak, L. ♦ Stefanski, M. ♦ Tomala, R. ♦ Hreniak, D. ♦ Strek, W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ABUNDANCE ♦ BORON IONS ♦ COMPARATIVE EVALUATIONS ♦ CONCENTRATION RATIO ♦ COPRECIPITATION ♦ CRYSTALS ♦ DEUTERIUM ♦ ERBIUM COMPOUNDS ♦ ERBIUM IONS ♦ LANTHANUM COMPOUNDS ♦ LUMINESCENCE ♦ NANOSTRUCTURES ♦ PHOTONS ♦ POTASSIUM COMPOUNDS ♦ SYNTHESIS ♦ YTTRIUM PHOSPHATES
Abstract The up-converting nanocrystals of KLa{sub 0.95}Er{sub 0.05}Y b{sub x}P{sub 4}O{sub 12} and La{sub 0.95−x}Er{sub 0.05}Y b{sub x}P{sub 5}O{sub 14} were prepared using co-precipitation method. The spectroscopic properties of these materials were investigated in a function of Y b{sup 3+} concentration. The up-conversion emission, power dependence of emission intensities, and the luminescence decay times were investigated. It was found that the green to red and {sup 2}H{sub 11/2} → {sup 4}I{sub 15/2} to {sup 4}S{sub 3/2} → {sup 4}I{sub 15/2} emission intensity ratio were strongly affected by the Y b{sup 3+} concentration. Moreover, the order of up-conversion emission and threshold power rises up with Y b{sup 3+} concentration for {sup 4}S{sub 3/2} → {sup 4}I{sub 15/2} transition. The luminescence decay time of the {sup 4}S{sub 3/2} → {sup 4}I{sub 15/2} emission increases with Y b{sup 3+} concentration while the {sup 4}F{sub 9/2} → {sup 4}I{sub 15/2} emission is independent of dopant concentration. The influence of the Y b{sup 3+} concentration on the up-conversion emission intensities was discussed in terms of concentration dependent hetero looped photon avalanche process. A comparison of the up-conversion properties of KLa{sub 0.95}Er{sub 0.05}Y b{sub x}P{sub 4}O{sub 12} and La{sub 0.95−x}Er{sub 0.05}Y b{sub x}P{sub 5}O{sub 14} nanocrystals was presented.
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-07
Publisher Place United States
Journal Journal of Chemical Physics
Volume Number 143
Issue Number 9


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