Abstract
Based on a citric acid-assisted hydrothermal method, series of Ce3+/Tb3+ activated fluorides have been synthesized. By controlling the amount of KNO3, the final products evolve from the Ce +/Tb + codoped orthorhombic phase GdF3 to the Ce +/Tb + codoped cubic phase KGdF4. The concentration of Ce3+ has great effects on the crystalline phases and the morphologies of final products. The Ce3+ concentration dependent samples illustrate the appearance of the hexagonal phase solid solution CeF3-GdF3-TbF3 in the final products. When the Ce3+ concentration is 20 mol%, the sample Ce20 presents the hexagonal phase CeF3 but the diffraction peaks move to higher degree. The x-ray diffraction patterns suggest the phase evolution of final products, the field emission scanning electron microscopy images present the variation in morphology of samples, and the photoluminescence excitation and emission spectra as well as the luminescent dynamic curves illustrate the optical properties of samples.
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F. Wang and X.G. Liu: Recent advances in the chemistry of lanthanide-doped upconversion nanocrystals. Chem. Soc. Rev. 38, 976 (2009).
S.V. Eliseeva and J.C. Bünzli: Lanthanide luminescence for functional materials and bio-sciences. Chem. Soc. Rev. 39, 189 (2010).
B. Yan and J.H. Wu: Facile composite synthesis and photoluminescence of NaGd(MoO4)2: Ln3+ (Ln = Eu, Tb) submicrometer phosphors. J. Mater. Res. 24, 32 (2009).
C-H. Liang, Y-C. Chang, Y-S. Chang, and S. Wu: Photoluminescence properties of Eu3+-doped BaY2ZnO5 phosphors under near-ultraviolet irradiation. J. Mater. Res. 25, 850 (2010).
C.X. Li and J. Lin: Rare earth fluoride nano-/microcrystals: Synthesis, surface modification and application. J. Mater. Chem. 20, 6831 (2010).
P.R. Diamente, M. Raudsepp, and F.C.J.M. van Veggel: Dispersible Tm3+-doped nanoparticles that exhibit strong 1.47 µm photoluminescence. Adv. Funct. Mater. 17, 363 (2007).
R.T. Wegh, H. Donker, K.D. Oskam, and A. Meijerink: Visible quantum cutting in LiGdF4:Eu3+ through downconversion. Science 283, 663 (1999).
F.T. You, S.H. Huang, S.M. Liu, and Y. Tao: VUV excited luminescence of MGdF4:Eu3+ (M=Na, K, NH4). J. Lumin. 110, 95 (2004).
P. Ptacek, H. Schäfer, K. Kömpe, and M. Haase: Crystal phase control of luminescing a-NaGdF4:Eu3+and ß-NaGdF4:Eu3+ nanocrystals. Adv. Funct. Mater. 17, 3843 (2007).
X.H. Liu, L.M. Wang, Z.Y. Wang, and Z.Q. Li: Synthesis of biocompatible and luminescent NaGdF4:Yb,Er@carbon nanoparticles in water-in-oil microemulsion. J. Mater. Res. 26, 82 (2011).
F. He, P.P. Yang, D. Wang, N. Niu, S.L. Gai, and X.B. Li: Self-assembled ß-NaGdF4 microcrystals: Hydrothermal synthesis, morphology evolution, and luminescence properties. Inorg. Chem. 50, 4116 (2011).
T. Lee, L. Luo, W. Diau, T. Chen, B. Cheng, and C. Tung: Visible quantum cutting through downconversion in green-emitting K2GdF5:Tb3+ phosphors. Appl. Phys. Lett. 89, 131121 (2006).
L.W. Yang, Y.Y. Zhang, J.J. Li, Y. Li, J.X. Zhong, and P.K. Chu: Magnetic and upconverted luminescent properties of multifunctional lanthanide doped cubic KGdF4 nanocrystals. Nanoscale 2, 2805 (2010).
C.Y. Cao, H.K. Yang, J.W. Chung, B.K. Moon, B.C. Choi, J.H. Jeong, and K.H. Kim: Hydrothermal synthesis and enhanced photoluminescence of Tb3+ in Ce3+/Tb3+ doped KGdF4 nanocrystals. J. Mater. Chem. 21, 10342 (2011).
Y-P. Du, Y-W. Zhang, L-D. Sun, and C-H. Yan: Optically active uniform potassium and lithium rare earth fluoride nanocrystals derived from metal trifluroacetate precursors. Dalton Trans. 8574 (2009).
R. Kumar, M. Nyk, T. Ohulchanskyy, C. Flask, and P. Prasad: Combined optical and MR bioimaging using rare earth ion doped NaYF4 nanocrystals. Adv. Funct. Mater. 19, 853 (2009).
Y. Park, J. Kim, K. Lee, K. Jeon, H. Na, J. Yu, H. Kim, N. Lee, S. Choi, S. Baik, H. Kim, S. Park, B. Park, Y. Kim, S. Lee, S. Yoon, I. Song, W. Moom, Y. Suh, and T. Hyeon: Nonblinking and nonbleaching upconverting nanoparticles as an optical imaging nanoprobe and T1 magnetic resonance imaging contrast agent. Adv. Mater. 21, 4467 (2009).
G.M. Karvianto and Chow: The effects of surface and surface coatings on fluorescence properties of hollow NaYF4:Yb,Er upconversion nanoparticles. J. Mater. Res. 26, 70 (2011).
L.P. Qian, D. Yuan, G.S. Yi, and G.M. Chow: Critical shell thickness and emission enhancement of NaYF4:Yb,Er/NaYF4/silica core/shell/shell nanoparticles. J. Mater. Res. 24, 3559 (2009).
G.F. Wang and Q. Peng: Synthesis and tunable photoluminescence of NaYF4:Eu/Ba nanocrystals. J. Mater. Res. 25, 2422 (2010).
J.H. Liang, Q. Peng, X. Wang, X. Zheng, R.J. Wang, X.P. Qiu, C.W. Nan, and Y.D. Li: Chromate nanorods/nanobelts: General synthesis, characterization, and properties. Inorg. Chem. 44, 9405 (2005).
Y.J. Huang, H.P. You, G. Jia, Y.H. Song, Y.H. Zheng, M. Yang, K. Liu, and N. Guo: Hydrothermal synthesis, cubic structure, and luminescence properties of BaYF5:RE (RE = Eu, Ce, Tb) nanocrystals. J. Phys. Chem. C 114, 18051 (2010).
G.G. Zhang, J. Wang, Y. Chen, and Q. Su: Two-color emitting of Ce3+ and Tb3+ co-doped CaLaGa3S6O for UV LEDs. Opt. Lett. 35, 2382 (2010).
Y.Q. Lei, M. Pang, W.Q. Fan, J. Feng, S.Y. Song, S. Dang, and H.J. Zhang: Microwave-assisted synthesis of hydrophilic BaYF5:Tb/Ce,Tb green fluorescent colloid nanocrystals. Dalton Trans. 40, 142 (2011).
H. Guo, H. Zhang, J.J. Li, and F. Li: Blue-white-green tunable luminescence from Ba2Gd2Si4O13:Ce3+,Tb3+ phosphors excited by ultraviolet light. Opt. Express 18, 27257 (2010).
F. Wang, Y. Han, C.S. Lim, Y.H. Lu, J. Wang, J. Xu, H.Y. Chen, C. Zhang, M.H. Hong, and X.G. Liu: Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping. Nature 463, 1061 (2010).
D.Q. Chen, Y.L. Yu, F. Huang, A.P. Yang, and Y.S. Wang: Lanthanide activator doped NaYb1-xGdxF4 nanocrystals with tunable down-, up-conversion luminescence and paramagnetic properties. J. Mater. Chem. 21, 6186 (2011).
D.Q. Chen, Y.L. Yu, F. Huang, and Y.S. Wang: Phase transition from hexagonal LnF3 (Ln = La, Ce, Pr) to cubic Ln0.8M0.2F2.8 (M = Ca, Sr, Ba) nanocrystals with enhanced upconversion induced by alkaline-earth doping. Chem. Commun. 47, 2601 (2011).
D.Q. Chen, Y.L. Yu, F. Huang, P. Huang, A.P. Yang, and Y.S. Wang: Modifying the size and shape of monodisperse bifunctional alkaline-earth fluoride nanocrystals through lanthanide doping. J. Am. Chem. Soc. 132, 9976 (2010).
C.X. Li, P.A. Ma, P.P. Yang, Z.H. Xu, G.G. Li, D.M. Yang, C. Peng, and J. Lin: Fine structural and morphological control of rare earth fluorides REF3 (RE = La–Lu, Y) nano/microcrystals: Microwave-assisted ionic liquid synthesis, magnetic and luminescent properties. CrystEngComm 13, 1003 (2011).
G. Blasse: The physics of new luminescent materials. Mater. Chem. Phys. 16, 201 (1987).
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Cao, C., Yang, H.K., Chung, J.W. et al. Ce3+/Tb3+ activated GdF3, KGdF4, and CeF3 submicro/nanocrystals: Synthesis, phase evolution, and optical properties. Journal of Materials Research 26, 2916–2923 (2011). https://doi.org/10.1557/jmr.2011.388
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DOI: https://doi.org/10.1557/jmr.2011.388