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Pr3+/Yb3+ co-doped beta-phase NaYF4 microprisms: controlled synthesis and upconversion luminescence.

Pr3+/Yb3+ co-doped beta-phase NaYF4 microprisms: controlled synthesis and upconversion luminescence.

Journal of nanoscience and nanotechnology (2014-04-18)

Wei Gao, Hairong Zheng, Dangli Gao, Enjie He, Jiao Li, Yinxun Tu

RESUMEN

Pr3+/Yb3+ co-doped hexagonal NaYF4(beta-NaYF4) microprisms were synthesized by the hydrothermal method, and ethylenediaminetetraacetic acid (EDTA) was introduced to control the size of the microcrystal samples. Bright upconverted fluorescence emission was observed when the samples were excited with an infrared (IR) laser at 976.4 nm. The emission was found to originate from the transitions of 3P0-3F2, 3P0-3H6 or 1G4-3H4, 3P1-3H6, 3P0-3H5, 3P1-3H5, and 3P0-3H4 of Pr3+ ions. Possible mechanisms for upconversion fluorescence and concentration dependence as well as the crystal structure and its formation of NaYF4:Yb3+/Pr3+ microprisms were explored and discussed based on the experimental observations.

MATERIALES

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Sigma-Aldrich

Yttrium, chips, 99.9% trace rare earth metals basis

Sigma-Aldrich

Ytterbium, powder, ≥99.9% trace rare earth metals basis

Ytterbium, lump, 25g, max. size 25mm, 99.9%

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Yttrium sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.9% trace metals basis

Yttrium, foil, 25mm disks, thickness 0.50mm, as rolled, 99%

Yttrium, foil, not light tested, 25x25mm, thickness 0.005mm, as rolled, 99%

Ytterbium, rod, 50mm, diameter 10.0mm, cast, 99%

Yttrium, wire reel, 0.05m, diameter 0.5mm, 99.9%

Yttrium, rod, 100mm, diameter 12.5mm, cast, 99%

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Praseodymium, rod, 100mm, diameter 6.35mm, cast, 99%

Ytterbium, lump, 100g, max. size 25mm, 99.9%

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Ytterbium, rod, 100mm, diameter 6.35mm, cast, 99%

Yttrium, wire reel, 0.05m, diameter 1.0mm, 99.9%

Ytterbium, foil, not light tested, 50x50mm, thickness 0.025mm, as rolled, 99%

Ytterbium, rod, 50mm, diameter 2.0mm, cast, 99%

Yttrium, rod, 100mm, diameter 6.35mm, cast, 99%

Yttrium, rod, 50mm, diameter 2.0mm, cast, 99%

Praseodymium, rod, 50mm, diameter 6.35mm, cast, 99%

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Yttrium, wire reel, 0.1m, diameter 0.5mm, 99.9%

Praseodymium, foil, not light tested, 25x25mm, thickness 0.015mm, as rolled, 99%

Ytterbium, foil, not light tested, 25x25mm, thickness 0.005mm, as rolled, 99%

Ytterbium, foil, not light tested, 25x25mm, thickness 0.025mm, as rolled, 99%

Praseodymium, foil, 50x50mm, thickness 0.25mm, as rolled, 99%

Praseodymium, foil, not light tested, 25x25mm, thickness 0.005mm, as rolled, 99%

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Yttrium, wire reel, 0.2m, diameter 1.0mm, 99.9%

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