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Near-infrared luminescence from Y2O3:Eu3+, Yb3+ prepared by sol-gel method.

Near-infrared luminescence from Y2O3:Eu3+, Yb3+ prepared by sol-gel method.

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

Ying Xie, Lin J Xiao, Feng Q Yan, Yong J Chen, Wen Z Li, Xiu J Geng

ABSTRACT

Eu3+ and Yb3+ codoped Y2O3 phosphors were synthesized by the sol-gel method. The phosphors possess absorption in the region of 300-550 nm, exhibiting an intense NIR emission of Yb3+ around 1000 nm, which is suitable for matching the maximum spectral response of c-Si solar cells. The optimum composition of Eu3+ and Yb3+ codoped Y2O3 was (Y1.94Yb0.04Eu0.02)2O3. It is observed that two-step energy transfer occurs from the 5D2 level of Eu3+ situated around (466 nm) exciting two neighboring Yb3+ ions to the 2F5/2 level (1000 nm). The down-conversion material based on Eu(3+)- Yb3+ couple may have great potential applications in c-Si solar cells to enhance their photovoltaic conversion efficiency via spectral modification.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Yttrium, chips, 99.9% trace rare earth metals basis

Sigma-Aldrich

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

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

Yttrium, foil, not light tested, 100x100mm, thickness 0.025mm, as rolled, 99%

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

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

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

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

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

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

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

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

Ytterbium, lump, 50g, max. size 25mm, 99.9%

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

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

Sigma-Aldrich

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

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

Yttrium, wire reel, 0.1m, diameter 1.0mm, 99.9%

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

Yttrium, rod, 50mm, diameter 12.5mm, cast, 99%

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

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

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

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

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

Europium, wire reel, 100mm, diameter 1.0mm, hard, 99.95%

Europium, wire reel, 50mm, diameter 1.0mm, hard, 99.95%