Influence of Different Gd³⁺ Doping on the Upconversion Luminescence Properties and Morphology of NaYF₄:Yb,E_r

Abstract:

Rare earth nitrate as the raw material, NaY/GdF₄ upconversion luminescent nanoparticles were prepared by hydrothermal method, its diameter is about 200nm. By changing the Gd³⁺ doping amount achieved NaYF₄ transition from the tetragonal to hexagonal phase, and the upconversion emission intensity can be improved by optimizing Gd³⁺ content. In 980nm excitation light source for the fluorescence test showed that the introduction of Gd³⁺ can effectively promote size reduction of NaY/GdF₄ crystals and decrease luminous intensity. Through mechanism analysis we know that is related to nanosize effect. At the same time, we discussed the upconversion luminescence mechanism of NaY/GdF₄ nanocrystals luminous intensity in different wavelength bands and the SEM show the morphology transformation from spherical to double-flower.

• Periodical: Key Engineering Materials (Volume 726)
• Pages: 250-254
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.726.250
• Online since: January 2017
• Authors: Cui Ping Zhong, Shu Wang Duo*, Jie Jun Zhang
• Keywords: Gd³⁺ Concentration, Hydrothermal, Upconversion Luminescence

References

[1] Yi G, Lu H, Zhao S, et al. Synthesis, characterization, and biological application of size-controlled nanocrystalline NaYF4: Yb, Er infrared-to-visible up-conversion phosphors, J. Nano Letters, 4 (11) (2004) 2191–2196.

DOI: 10.1021/nl048680h.s001

[2] Xing M M, Cao W H, FU Y. et al. Synthesis of Y2O3: Yb, Er nanocrystals by complex precipitation method and its up-conversion luminescence properties[J]. J, Funct. Mater. 2006, 37(9) : 1375-1377.

[3] Liu W D, zhan S P, Zhang J. et al. Remarkable modulation effects of Ag ion on fluorescence of Eu3+ ion doped yttrium phosphate nanophosphors [J]. Materials Research Bulletin. 2013, 48(5): 1989-(1994).

DOI: 10.1016/j.materresbull.2013.02.020

[4] Xu Feng-xiu, Feng Guang-jian, Liu Su-wen, et al. A study on visible light photocatalytic activity of nano TiO2 doped with upconversion luminescence agent[J]. Bulletin of Chinese Ceramic society, 2008, 27(6): 1140-1145.

[5] Yu X F, Li M, Xie M Y. et al. Dopant-Controlled synthesis of water-soluble hexagonal NaYF4 nanorods with efficient upconversion fluorescence for multicolor bioimaging [J]. Nano Res, 2010, 3(1) : 51-60.

DOI: 10.1007/s12274-010-1008-2

[6] Wan Y, Tang M H, Chen X C. et al. Inhibitory effect of liposomal quercetin on acute hepatitis and hepatic fibrosis induced by concanavalin A [J]. Braz J Med Biol Res, 2014, 47(81) : 655-661.

DOI: 10.1590/1414-431x20143704

[7] Wang F, Wang J A, Liu X G. Direct evidence of a surface quenching effect on size-dependent luminescence of upconversion nanoparticles [J]. Angew. Chem. Int. 2010, 49(41) : 7456-7460.

DOI: 10.1002/anie.201003959

[8] Wang F, Liu X G. Upconversion multicolor fine-tuning: Visible to near-infrared emission from lanthanide-doped NaYF4 nanoparticles[J]. Journal of American Chemistry Society. 2008, 130(17): 5642-5643.

DOI: 10.1021/ja800868a

[9] Wang F, Han Y, Lim C S, et al. Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping [J]. Nature. 2010, 463(7284) : 1061 -1065.

DOI: 10.1038/nature08777