Preparation of NaYF4:Er3+/TiO2 composite and up-conversion luminescence properties under visible light excitation

doi:10.1088/1674-1056/20/8/087803

中国物理B ›› 2011, Vol. 20 ›› Issue (8): 87803-087803.doi: 10.1088/1674-1056/20/8/087803

Preparation of NaYF₄:Er³⁺/TiO₂ composite and up-conversion luminescence properties under visible light excitation

闫志云¹, 张德恺¹, 苗慧¹, 商毅博¹, 杨娟¹, 叶岩溪², 胡晓云², 刘恩周³, 樊君³

(1)Department of Physics, Northwest University, Xi'an 710069, China; (2)Department of Physics, Northwest University, Xi'an 710069, China; National Photoelectric Technology and Functional Materials & Application of Science and Technology for International Cooperation Base, Northwest University, Xi’an 710069, China; (3)School of Chemical Engineering, Northwest University, Xi'an 710069, China

收稿日期:2010-12-07 修回日期:2011-03-22 出版日期:2011-08-15 发布日期:2011-08-15
基金资助:
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).

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

Received:2010-12-07 Revised:2011-03-22 Online:2011-08-15 Published:2011-08-15
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: up-conversion luminescence, NaYF₄:, Er³⁺/TiO₂ composite, excitation of visible light

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.

Key words: up-conversion luminescence, NaYF₄: Er³⁺/TiO₂ composite, excitation of visible light

中图分类号: (Photoluminescence, properties and materials)

78.55.-m

77.84.Lf (Composite materials) 32.80.Rm (Multiphoton ionization and excitation to highly excited states)

叶岩溪, 胡晓云, 闫志云, 刘恩周, 樊君, 张德恺, 苗慧, 商毅博, 杨娟. Preparation of NaYF₄:Er³⁺/TiO₂ composite and up-conversion luminescence properties under visible light excitation[J]. 中国物理B, 2011, 20(8): 87803-087803.

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[J]. Chin. Phys. B, 2011, 20(8): 87803-087803.

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Preparation of NaYF₄:Er³⁺/TiO₂ composite and up-conversion luminescence properties under visible light excitation

Preparation of NaYF₄:Er³⁺/TiO₂ composite and up-conversion luminescence properties under visible light excitation

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