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Synthesis and tunable photoluminescence of NaYF4∶Eu/Ba nanocrystals

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Abstract

Sub-10 nm monodispersed NaYF4:Eu/Ba nanocrystals were synthesized by a hydrothermal method. Under 396-nm excitation, in addition to the characteristic emissions of Eu+3 ions, an intense emission band originating from the d-f transition of the Eu3+ ions is also observed, indicating that Eu+3 and Eu2+ coexist in Eu/Ba-codoped NaYF4 nanocrystals. The dependence of the luminescence on the Ba2+ concentration was studied. Tunable photoluminescence of NaYF4:Eu nanocrystals was successfully achieved by codoping with Ba2+ ions. In addition, when the Ba/Ln ratio is 3:7 and 4:1, pure cubic Ba0.92Y2.15F8.29:Eu and tetragonal BaYF5:Eu nanocrystals were obtained, respectively.

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Authors and Affiliations

  1. Department of Chemistry and State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China

    Guofeng Wang & Qing Peng

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  1. Guofeng Wang
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  2. Qing Peng
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Correspondence to Qing Peng.

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Wang, G., Peng, Q. Synthesis and tunable photoluminescence of NaYF4∶Eu/Ba nanocrystals . Journal of Materials Research 25, 2422–2425 (2010). https://doi.org/10.1557/jmr.2010.0297

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