光谱学与光谱分析 |
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Near-Infrared Fluorescence and Energy Transfer in Sr2SiO4∶Eu2+,Nd3+ |
YANG Li-li1,WAN Wen-jiao1,LI Jin-qing1,MENG Jian-xin2* |
1. Department of Chemistry, Jinan University, Guangzhou 510632,China
2. Institute of Nano-Chemistry, Jinan University, Guangzhou 510632,China |
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Abstract Sr2SiO4∶Eu2+, Nd3+ was synthesized by solid state synthesis method, and the sensitization of Nd3+ near-infrared luminescence by Eu2+ was investigated. The characteristic near-infrared luminescence of Nd3+ in Sr2SiO4 matrix was greatly enhanced by co-doping of Eu2+. The mechanism of energy transfer from Eu2+ to Nd3+ was analyzed through investigation of fluorescence excitation and emission spectra, and fluorescence lifetime. Excited Eu2+(Ⅱ) transfers energy effectively to Nd3+ through non-radiative energy transfer process in Sr2SiO4, resulting in greatly enhanced near-infrared luminescence of Nd3+, while sensitization of Nd3+ by Eu2+(Ⅰ) was achieved by the way of Eu2+(Ⅱ).
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Received: 2010-05-10
Accepted: 2010-08-20
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Corresponding Authors:
MENG Jian-xin
E-mail: tmjx@jnu.edu.cn
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