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Issue 16, 2014
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Morphology control, luminescence and energy transfer properties of NaCeF4 and NaCeF4:Tb3+/Yb3+ nanocrystals

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Abstract

Oil-dispersible monodispersed NaCeF4, NaCeF4:Tb3+ and NaCeF4:Yb3+ nanoparticles were prepared through a thermal decomposition method. Phase purity, morphology and luminescence properties were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high resolution TEM (HRTEM), and photoluminescence (PL) spectra, respectively. The starting amount of NaF is crucial for phase purity, and the reaction time had an effect on the morphology of the products. Products with rectangles, rods, and their mixtures could be obtained at different reaction times. Under UV excitation, energy transfer from Ce3+ to lanthanide ions Tb3+ and Yb3+ could be observed in both NaCeF4:Tb3+ and NaCeF4:Yb3+. Energy transfer from Ce3+ to Tb3+ was proposed to be of a resonant type (ET) by luminescent dynamic studies with a theoretically calculated efficiency of up to 93%. Energy transfer from Ce3+ to Yb3+ was demonstrated to be a cooperative (CET) process, and the CET efficiency and total theoretical quantum efficiency were found to be 79% and 158%, respectively.

Graphical abstract: Morphology control, luminescence and energy transfer properties of NaCeF4 and NaCeF4:Tb3+/Yb3+ nanocrystals

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Publication details

The article was received on 15 Apr 2014, accepted on 11 Jun 2014 and first published on 16 Jun 2014


Article type: Paper
DOI: 10.1039/C4NR02023E
Citation: Nanoscale, 2014,6, 9703-9712
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    Morphology control, luminescence and energy transfer properties of NaCeF4 and NaCeF4:Tb3+/Yb3+ nanocrystals

    H. Lian, Y. Dai, D. Yang, Z. Cheng, C. Li, Z. Hou, M. Shang and J. Lin, Nanoscale, 2014, 6, 9703
    DOI: 10.1039/C4NR02023E

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