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Issue 8, 2011
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Eu3+ doped KYF4 nanocrystals: synthesis, electronic structure, and optical properties

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Abstract

Monodisperse cubic-phase KYF4 : Eu3+ nanocrystals (NCs) were synthesized via a modified thermal decomposition method. The optical properties of Eu3+ in KYF4 NCs including multiple luminescence centers, site symmetry, luminescence dynamics, as well as crystal-field levels of Eu3+ were investigated in detail based on high-resolution photoluminescence (PL) spectroscopy at low temperature (10 K). Different from Eu3+ in bulk counterparts, multiple sites of Eu3+ in KYF4 NCs were revealed by using the luminescence of Eu3+ as a sensitive structural probe. The highest site symmetry of Eu3+ at new near-surface site was deduced to be distorted from Oh to D2 (or C2v). Due to a small filling factor (0.45) of NCs, the PL lifetime of 5D0 of Eu3+ in KYF4 NCs was much longer than that in bulk counterparts, which was found to be significantly affected by the surrounding medium around the NCs.

Graphical abstract: Eu3+ doped KYF4 nanocrystals: synthesis, electronic structure, and optical properties

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Publication details

The article was received on 31 Mar 2011, accepted on 30 Apr 2011 and first published on 16 Jun 2011


Article type: Paper
DOI: 10.1039/C1NR10341E
Citation: Nanoscale, 2011,3, 3164-3169
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    Eu3+ doped KYF4 nanocrystals: synthesis, electronic structure, and optical properties

    Y. Wang, Y. Liu, Q. Xiao, H. Zhu, R. Li and X. Chen, Nanoscale, 2011, 3, 3164
    DOI: 10.1039/C1NR10341E

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