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Solvothermal synthesis and upconversion emission of monodisperse ultrasmall SrYbF5 nanocrystals

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Abstract

Uniform ultrasmall monodisperse SrYbF5 and SrErF5 nanocrystals (NCs) were synthesized via solvothermal method using oleic acid as stabilizing agent. Transmission electron microscopy and X-ray diffraction assays reveal that the as-synthesized NCs are of face-centered cubic structure and the cell parameters are 5.608 Å (SrYbF5) and 5.632 (SrErF5) Å. Under the excitation of a 980 nm laser, visible upconversion (UC) emission can be observed by naked eyes in Tm3+ or Er3+ doped SrYbF5 NCs. The integrated intensity of infrared emission is nearly two orders of magnitude stronger than that of the blue emission of SrYbF5:Tm3+ NCs. The energy transfer UC emission mechanisms were also investigated.

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Acknowledgements

The authors would like to acknowledge financial support from the Scientific Research Fund of China Hunan Provincial Science & Technology Department (No. 2009SK3145) and the Science and Technology on Electro-Optical Information Security Control Laboratory (No. 9140C150303110C1504).

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Correspondence to Changfu Xu.

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Gong, L., Yang, J., Li, Y. et al. Solvothermal synthesis and upconversion emission of monodisperse ultrasmall SrYbF5 nanocrystals. J Mater Sci 48, 3672–3678 (2013). https://doi.org/10.1007/s10853-013-7163-6

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  • DOI: https://doi.org/10.1007/s10853-013-7163-6

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