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Preparation of NaYF4:Er3+/TiO2 composite and up-conversion luminescence properties under visible light excitation |
Ye Yan-Xi(叶岩溪)a)c), Hu Xiao-Yun(胡晓云)a)c)†, Yan Zhi-Yun(闫志云)a), Liu En-Zhou(刘恩周)b), Fan Jun(樊君)b), Zhang De-Kai(张德恺)a), Miao Hui(苗慧)a), Shang Yi-Bo(商毅博) a), and Yang Juan(杨娟)a) |
a Department of Physics, Northwest University, Xi'an 710069, China; b School of Chemical Engineering, Northwest University, Xi'an 710069, China ; c National Photoelectric Technology and Functional Materials & Application of Science and Technology for International Cooperation Base, Northwest University, Xi’an 710069, China |
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Abstract The up-conversion luminescence composite NaYF4:,Er3+/TiO2 is prepared using the sol—gel method. The specimen has good crystallinity and two shapes, i.e., viereck and round, while the sizes of viereck and round particles are both micron-sized. The TiO2 has an anatase structure, while the NaYF4 has a hexagonal phase, which can be hardly obtained through the common sol—gel method. Due to the big particle size and the high crystallinity of pure NaYF4:,Er3+, the composite has a small specific surface area that is less than Degussa P25 TiO2. The NaYF4:,Er3+/TiO2 composite shows several emission peaks at 211, 237, and 251 nm under the excitation of 388 nm, at 395 nm and 411 nm under the excitation of 500 nm, and at 467, 481, 492, and 508 nm under the excitation of 570 nm.
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Received: 07 December 2010
Revised: 22 March 2011
Accepted manuscript online:
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PACS:
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78.55.-m
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(Photoluminescence, properties and materials)
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77.84.Lf
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(Composite materials)
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 20876125), the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20096101110013), and the Northwest University Graduate Cross-Discipline Funds (Grant Nos. 09YJC27, 09YJC24, and 201031). |
Cite this article:
Ye Yan-Xi(叶岩溪), Hu Xiao-Yun(胡晓云), Yan Zhi-Yun(闫志云), Liu En-Zhou(刘恩周), Fan Jun(樊君), Zhang De-Kai(张德恺), Miao Hui(苗慧), Shang Yi-Bo(商毅博), and Yang Juan(杨娟) Preparation of NaYF4:Er3+/TiO2 composite and up-conversion luminescence properties under visible light excitation 2011 Chin. Phys. B 20 087803
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