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Emerging La2O2CN2 matrix with controllable 3D morphology for photoluminescence applications


Special morphological La-2O2CN2 and La2O2CN2:RE3+ (RE = Eu, Dy, Tb, Tm, and Yb/Er) with 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 morphologies regulation of the products are realized via simply adjusting a series of experimental parameters including sodium citrate amount, reaction temperature, and pH value of the initial solution. Simultaneously, 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 fluorescent colors based on the characterized transition of different rare earth ions. Additionally, upon 980 nm laser excitation, La2O2CN2:Yb/Er phosphors have strong upconversion emissions. Therefore, La-2O2CN2 microstructures are excellent matrixes and as-synthesized La2O2CN2:RE3+ samples have potential applications in fluorescent lamps, field emission displays, biological labeling and catalysis.

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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, Accepted Manuscript
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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, Y. Hui, J. Wang and G. Liu, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01418J

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