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Wet Chemical Preparation of Nanoparticles ZnO:Eu3+ and ZnO:Tb3+ with Enhanced Photoluminescence

DOI: 10.1155/2014/684601

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Abstract:

ZnO doped with Eu3+ and Tb3+ had been successfully prepared by wet chemical method with the assistance of microwave. The influence of reaction conditions such as temperature, time, content of Eu3+, Tb3+ ion, and annealing treatment on the structure and luminescent characteristics was studied. The analysis of energy dispersive spectroscopy (EDS) and photoluminescence spectra measurements indicated that Eu3+ and Tb3+ exist in host lattice and create the new emission region compared to ZnO crystalline host lattice. The field emission scanning electron microscope (FE-SEM) studies show the Eu3+, Tb3+ doped ZnO nanoparticles have a pseudohexagonal shape. The particle size was 30–50?nm for ZnO:Eu3+ and 40–60?nm for ZnO:Tb3+. Photoluminescence excitation (PLE) and photoluminescence (PL) spectra at room temperature have been studied to recognize active centers for characteristic luminescence of ZnO:Eu3+ and ZnO:Tb3+. The characteristic luminescent lines of Eu3+ (5D0-7Fj) and Tb3+ (5D4-7Fj) were determined. It has been demonstrated that the wet chemical synthesis method with microwave assistance can strongly enhance the luminescent intensity of nanoparticles ZnO:Eu3+ in red and ZnO:Tb3+ in green. 1. Introduction Rare earth (RE) doped ZnO has been increasingly taking an important role in optoelectronics and photonics [1, 2]. In several industrial branches such as ceramics, rubber additives, pigments, and medicines, ZnO has been widely used. ZnO represents as a wide-band gap semiconductor (Eg?=?3.37?eV at 300?K) with a large exciton binding energy (60?meV), exhibiting near UV emission and piezoelectricity with high optical gain. ZnO is also biosafe and biocompatible and may be used for biomedical applications. Recently, the discovery of the ultraviolet laser and piezoelectric and photocatalysis properties of ZnO nanostructures has triggered several new applications. Various physical and chemical routes, such as physical vapor deposition, thermal evaporation, chemical vapor deposition (CVD), metal-organic chemical vapor deposition, and colloidal wetting chemical synthesis, have been used to prepare a wide range of ZnO nanostructures [3–12]. These superior properties of ZnO make it suitable for short-wavelength optoelectronic devices application such as light emitting diodes, laser diodes, and room-temperature UV laser diodes [13]. Furthermore, ZnO:RE nanoparticles, nanorods, nanowires, nanobelts, and thin films with their unique structure properties and physical properties have been widely fabricated in using the different wet chemical solution methods [14–20]. In

References

[1]  K. Yamamoto, K. Nagasawa, and T. Ohmori, “Preparation and characterization of ZnO nanowires,” Physica E: Low-Dimensional Systems and Nanostructures, vol. 24, no. 1-2, pp. 129–132, 2004.
[2]  G.-C. Yi, C. Wang, and W. I. Park, “ZnO nanorods: synthesis, characterization and applications,” Semiconductor Science and Technology, vol. 20, no. 4, pp. S22–S34, 2005.
[3]  P. Jiang, J.-J. Zhou, H.-F. Fang, C.-Y. Wang, Z. L. Wang, and S.-S. Xie, “Hierarchical shelled ZnO structures made of bunched nanowire arrays,” Advanced Functional Materials, vol. 17, no. 8, pp. 1303–1310, 2007.
[4]  H. Yoon, J. H. Wu, J. H. Min, J. S. Lee, J. S. Ju, and Y. K. Kim, “Magnetic and optical properties of monosized Eu doped ZnO nanocrystals from nanoemulsion,” Journal of Applied Physics, vol. 111, Article ID 07B523, 2012.
[5]  T. K. Anh, D. X. Loc, T. T. Huong, N. Vu, and L. Q. Minh, “Luminescent nanomaterials containing rare earth ions for security printing,” International Journal of Nanotechnology, vol. 8, no. 3–5, pp. 335–346, 2011.
[6]  J. X. Zhao, X. H. Lu, Y. Z. Zheng, S. Q. Bi, X. Tao, and J. F. Chen W Zhou, “Eu doping for hierarchical ZnO nanocrystalline aggregates based dye- sensitized solar cell,” Electrochemistry Communications, vol. 32, pp. 14–17, 2013.
[7]  Y. Terai, K. Yamaoka, K. Yoshida, T. Tsuji, and Y. Fujiwara, “Photoluminescence properties of Eu-doped ZnO films grown by sputtering-assisted metalorganic chemical vapor deposition,” Physica E: Low-Dimensional Systems and Nanostructures, vol. 42, no. 10, pp. 2834–2836, 2010.
[8]  Y.-P. Du, Y.-W. Zhang, L.-D. Sun, and C.-H. Yan, “Efficient energy transfer in monodisperse Eu-doped ZnO nanocrystals synthesized from metal acetylacetonates in high-boiling solvents,” Journal of Physical Chemistry C, vol. 112, no. 32, pp. 12234–12241, 2008.
[9]  P. Mohanty, B. Kim, and J. Park, “Synthesis of single crystalline europium-doped ZnO nanowires,” Materials Science and Engineering B: Solid-State Materials for Advanced Technology, vol. 138, no. 3, pp. 224–227, 2007.
[10]  A. Ishizumi and Y. Kanemitsu, “Structural and luminescence properties of Eu-doped ZnO nanorods fabricated by a microemulsion method,” Applied Physics Letters, vol. 86, no. 25, Article ID 253106, 2005.
[11]  A. S. Pereira, M. Peres, M. J. Soares et al., “Synthesis, surface modification and optical properties of Tb3+ -doped ZnO nanocrystals,” Nanotechnology, vol. 17, no. 3, pp. 834–839, 2006.
[12]  T. K. Anh, D. X. Loc, L. T. K. Giang, W. Strek, and L. Q. Minh, “Preparation, optical properties of ZnO, ZnO:Al nanorods and Y(OH)3 :Eu nanotube,” Journal of Physics: Conference Series, vol. 146, Article ID 012001, 2009.
[13]  L. Luo, L. Gong, Y. F. Liu et al., “Enhanced ultraviolet lasing from europium-doped zinc oxide nanocrystals,” Optical Materials, vol. 32, pp. 1066–1070, 2010.
[14]  G. Singh Lotey, Z. Jindal, V. Kumar, and N. K. Verma, “Study on room temperature magnetic behavior of Tb-doped ZnO nanoparticles,” in Proceedings of the Microtech Conference and Expo, June 2012.
[15]  A. Sharma, S. Dhar, B. P. Singh, T. Kundu, M. Spasova, and M. Farle, “Influence of Tb doping on the luminescence characteristics of ZnO nanoparticles,” Journal of Nanoparticle Research, vol. 14, no. 2, article 676, 2012.
[16]  M. K. Debanath and S. Karmakar, “Study of blushift of optical band gap in Zinc oxide (ZnO) nanoparticles prepared by low-temperature wet chemical method,” Materials Letters, vol. 111, pp. 116–119, 2013.
[17]  Y. I. Jung, S. H. Baek, and I. Kyu Park, “Growth of Eu doped ZnO nanorods on silicon substrate by low temperature hydrothermal method,” Thin Solid Films, vol. 546, pp. 259–262, 2013.
[18]  Y. Tan, Z. Fang, W. Chen, and P. He, “Structural, optical and magnetic properties of Eu-doped ZnO films,” Journal of Alloys and Compounds, vol. 509, no. 21, pp. 6321–6324, 2011.
[19]  J. Yang, X. Li, J. Lang et al., “Synthesis and optical properties of Eu-doped ZnO nanosheets by hydrothermal method,” Materials Science in Semiconductor Processing, vol. 14, no. 3-4, pp. 247–252, 2011.
[20]  M. Wang, C. Huang, Z. Huang et al., “Synthesis and photoluminescence of Eu-doped ZnO microrods prepared by hydrothermal method,” Optical Materials, vol. 31, no. 10, pp. 1502–1505, 2009.
[21]  H. Shahroosvand and M. Ghorbani-asl, “Solution based synthetic strategies for Eu doped ZnO nanoparticle with enhanced red photoluminescence,” Journal of Luminescence, vol. 144, pp. 223–229, 2013.

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