Composition dependence of the Yb-participated strong up-conversions in polycrystalline ErYb silicate

► Polycrystalline ErYb silicate powders were fabricated and characterized. ► Yb-participated Er up-conversions induced strong visible emissions. ► Yb can enhance the Er up-conversions beyond dilution and sensitization effect. Polycrystalline ErxYb2−xSiO5 (x=0, 0.2, 0.5, 1, 2) powders were fabricated...

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Bibliographic Details
Published in:Optical materials 2012-06, Vol.34 (8), p.1289-1293
Main Authors: Wang, B., Guo, R.M., Wang, X.J., Wang, L., Zhou, Z.
Format: Article
Language:English
Subjects:
Annealing
Concentration (composition)
Diffraction
Erbium
ErYb silicate
Lasers
Luminescence
Silicates
Sol gel process
Up-conversion
Upconversion
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Summary:► Polycrystalline ErYb silicate powders were fabricated and characterized. ► Yb-participated Er up-conversions induced strong visible emissions. ► Yb can enhance the Er up-conversions beyond dilution and sensitization effect. Polycrystalline ErxYb2−xSiO5 (x=0, 0.2, 0.5, 1, 2) powders were fabricated by sol–gel method and crystallized by 1200°C annealing. The crystal structure variation as a function of composition was revealed by X-ray diffraction measurement. Intense Er visible and infrared luminescence was observed using 974nm and 650nm laser excitation. Yb-participated strong Er up-conversions in the visible range show different Green to Red emission ratios for the different Er concentrations samples. The dilution of Er by Yb was responsible for the increase of the 1.53μm photoluminescence lifetime. The potential applications of the ErYb silicate were predicted under different pumping wavelengths.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2012.02.001