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Sub-5 nm Ln3+-doped BaLuF5 Nanocrystals: A Platform to Realize Upconversion via Interparticle Energy Transfer (IPET)

Authors

  • Shyam Sarkar,

    1. Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER-Kolkata), Mohanpur Campus, Nadia, WB 741252, India
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  • Brahmaiah Meesaragandla,

    1. Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER-Kolkata), Mohanpur Campus, Nadia, WB 741252, India
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  • Chanchal Hazra,

    1. Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER-Kolkata), Mohanpur Campus, Nadia, WB 741252, India
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  • Venkataramanan Mahalingam

    Corresponding author
    1. Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER-Kolkata), Mohanpur Campus, Nadia, WB 741252, India
    • Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER-Kolkata), Mohanpur Campus, Nadia, WB 741252, India.
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Abstract

The upconversion process is reported to occur via interparticle energy transfer (IPET) achieved with Ln3+-doped BaLuF5 (Ln = Tm and Yb) nanocrystals in the size range of sub 5 nm. Both Yb3+ and Tm3+ ions are independently doped in BaLuF5 nanocrystals. Colloidal mixtures containing the above two nanocrystals show strong upconversion emission in the blue, red, and near-IR regions via IPET.

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