| 光谱学与光谱分析 |
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| Near-Infrared Luminescence and Energy Transfer of ACaPO4∶Eu2+, Nd3+(A=Li, K, Na) |
| XIAO Quan-lan1, ZOU Shao-yu1, LIU Guan-xi1, PENG Wen-fang1, WAN Chui-ming1, XIE Li-juan1, MENG Jian-xin2* |
1. Department of Chemistry, Jinan University, Guangzhou 510632, China
2. Institute of Nanochemistry, Jinan Univesity, Guangzhou 510632, China |
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Abstract Near-infrared (NIR) luminescence phosphors ACaPO4∶Eu2+,Nd3+(A=Li, K, Na) were prepared by conventional solid state method and the sensitization of Nd3+ near-infrared luminescence by Eu2+ was investigated. The characteristic NIR luminescence of Nd3+ in ACaPO4 matrix is greatly enhanced by co-doping of Eu2+. The fluorescence properties of ACaPO4∶Eu2+, the NIR luminescence properties of ACaPO4∶Eu2+,Nd3+ and the fluorescence lifetime were studied. The effect of emission wavelength of Eu2+ on NIR luminescence of Nd3+ was investigated; The energy transfer mechanism between Eu2+ and Nd3+ was also discussed. Emission peak wavelength of Eu2+ In ACaPO4 matrixes was found red shift with the series of A=Li, K, Na and the extent of the overlap with the different excitation peaks of Nd3+ changes obviously. It was concluded that the emission peak position of Eu2+ is a very important factor for energy transfer, and the optimal wavelength range for Eu2+→Nd3+ energy transfer is 500 to 550 nm.
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Received: 2010-10-19
Accepted: 2011-04-14
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Corresponding Authors:
MENG Jian-xin
E-mail: tmjx@jnu.edu.cn
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