Spectroscopy and Spectral Analysis, Volume. 31, Issue 9, 2332(2011)
Near-Infrared Luminescence and Energy Transfer of ACaPO4∶Eu2+, Nd3+(A=Li, K, Na)
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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XIAO Quan-lan, ZOU Shao-yu, LIU Guan-xi, PENG Wen-fang, WAN Chui-ming, XIE Li-juan, MENG Jian-xin. Near-Infrared Luminescence and Energy Transfer of ACaPO4∶Eu2+, Nd3+(A=Li, K, Na)[J]. Spectroscopy and Spectral Analysis, 2011, 31(9): 2332
Received: Oct. 19, 2010
Accepted: --
Published Online: Nov. 9, 2011
The Author Email: Quan-lan XIAO (xiaoquanlan@126.com)