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Brightly luminescent and color-tunable CaMoO4:RE3+ (RE = Eu, Sm, Dy, Tb) nanofibers synthesized through a facile route for efficient light-emitting diodes

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Abstract

One-dimensional CaMoO4:RE3+ (RE = Eu, Sm, Dy, Tb) nanofibers were successfully synthesized through a facile supersaturated recrystallization process. These CaMoO4:Ln3+ nanofibers have the length ranging from 40 to 70 nm and the width of nearly 2 nm. Under UV excitation, these single-doped CaMoO4 nanofibers shown stronger emission, and the photoluminescence quantum efficiency is 25.7% (CaMoO4:Eu3+), 22.4% (CaMoO4:Sm3+), 23.2% (CaMoO4:Dy3+) and 27.7% (CaMoO4:Tb3+), respectively. Moreover, our work reveals that various emission colors can be obtained and tuned from pure red to delight green via co-doping Tb3+ and Eu3+ in the CaMoO4 host, and the energy transfer properties from Tb3+ to Eu3+ are also demonstrated. Finally, we apply the green CaMoO4:Tb3+, red CaMoO4:Eu3+ and white CaMoO4:0.05Tb3+, 0.02Eu3+ for LED devices, and these nanofiber-based LEDs present high efficiency and stability, which indicates the promising application in future optoelectronic fields.

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Acknowledgements

This work was supported by the Innovation Program of Shanghai Municipal Education Commission (14ZZ127) and PCSIRT (IRT_16R49).

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Authors and Affiliations

  1. Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China

    Yang Ding, Jie Liu, Yan Zhu, Siyang Nie, Weili Wang, Junli Shi, Yanru Miu & Xibin Yu

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  1. Yang Ding
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  2. Jie Liu
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  3. Yan Zhu
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  4. Siyang Nie
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  5. Weili Wang
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  6. Junli Shi
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Correspondence to Jie Liu or Xibin Yu.

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Ding, Y., Liu, J., Zhu, Y. et al. Brightly luminescent and color-tunable CaMoO4:RE3+ (RE = Eu, Sm, Dy, Tb) nanofibers synthesized through a facile route for efficient light-emitting diodes. J Mater Sci 53, 4861–4873 (2018). https://doi.org/10.1007/s10853-017-1888-6

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  • DOI: https://doi.org/10.1007/s10853-017-1888-6

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