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Issue 43, 2017
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Emerging La2O2CN2 matrix with controllable 3D morphology for photoluminescence applications

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Abstract

La2O2CN2 and La2O2CN2:RE3+ (RE = Eu, Dy, Tb, Tm, and Yb/Er) complexes with special morphologies, having uniform rod-like, umbrella-like, cauliflower-like and mushroom-like microarchitectures, have been successfully synthesized by combining a simple hydrothermal route with cyanamidation technology. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectra (EDX), and photoluminescence (PL) spectra were used to characterize the samples. The morphology regulation of the products was realized via simply adjusting a series of experimental parameters, including sodium citrate amount, reaction temperature and pH value of the initial solution; the growth mechanisms have been proposed. Under ultraviolet light excitation, the as-obtained La2O2CN2:RE3+ (RE = Eu, Dy, Tb, Tm) products successfully exhibit downconversion emissions showing different fluorescence colors based on the characterized transitions of different rare earth ions. Additionally, upon 980 nm laser excitation, La2O2CN2:Yb/Er phosphors have strong upconversion emissions. La2O2CN2 microstructures are therefore excellent matrixes, and the as-synthesized La2O2CN2:RE3+ samples have potential applications in fluorescent lamps, field emission displays, biological labeling and catalysis.

Graphical abstract: Emerging La2O2CN2 matrix with controllable 3D morphology for photoluminescence applications

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Publication details

The article was received on 03 Aug 2017, accepted on 06 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7CE01418J
Citation: CrystEngComm, 2017,19, 6498-6505
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    Emerging La2O2CN2 matrix with controllable 3D morphology for photoluminescence applications

    H. Bai, Y. Song, D. Li, Q. Ma, X. Dong, W. Yu, Y. Yang, H. Yu, J. Wang and G. Liu, CrystEngComm, 2017, 19, 6498
    DOI: 10.1039/C7CE01418J

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