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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 property

Abstract

Europium-doped gallium nitride (Eu:GaN) nanocrystals with hexagonal wurtzite structure were prepared from the decomposition of precursor EuxGa1-x(H2NCONH2)6Cl3 at a mild temperature of 350 oC. The absorption spectrum, the excitation spectra and the fluorescence emission spectra of Eu:GaN nanocrystals are measured and discussed. Eu:GaN has 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 energy transfer should occur between GaN host and Eu3+ ion under the excitation of 370 nm, thus the fluorescence emission efficiency of Eu3+ ion 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.

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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, Accepted Manuscript
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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 property

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

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