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Issue 31, 2017
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Mild preparation and high fluorescence emission efficiency of europium-doped gallium nitride nanocrystals and first-principles density functional theoretical analysis of optical properties

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Abstract

Europium-doped gallium nitride (Eu:GaN) nanocrystals with hexagonal wurtzite structures were prepared from the decomposition of the EuxGa1−x(H2NCONH2)6Cl3 precursor at a mild temperature of 350 °C. The absorption spectrum, the excitation spectra and the fluorescence emission spectra of Eu:GaN nanocrystals are measured and discussed. Eu:GaN has a strong fluorescence emission band in the visible region. Furthermore, the first-principles density functional theory has been adopted to explore the fluorescence mechanism. The results show that energy transfer should occur between the GaN host and Eu3+ ions under excitation at 370 nm, and thus the fluorescence emission efficiency of the Eu3+ ions can be improved. In order to further reduce the loss of fluorescence emission and increase the fluorescence quantum yield, Eu:GaN nanocrystals coated by biocompatible silica and dispersed in ethanol are also discussed.

Graphical abstract: Mild preparation and high fluorescence emission efficiency of europium-doped gallium nitride nanocrystals and first-principles density functional theoretical analysis of optical properties

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Publication details

The article was received on 20 May 2017, accepted on 07 Jul 2017 and first published on 07 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02228J
Citation: J. Mater. Chem. C, 2017,5, 7904-7910
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    Mild preparation and high fluorescence emission efficiency of europium-doped gallium nitride nanocrystals and first-principles density functional theoretical analysis of optical properties

    X. Hu, N. Zhou, Y. Hu, Y. Li, N. Chen, B. Zhao, Y. Zhang and N. Zhuang, J. Mater. Chem. C, 2017, 5, 7904
    DOI: 10.1039/C7TC02228J

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