Preparation and Characterization of Upconversion Phosphor Based on AlF3-YbF3∶Er3+
ZHOU He-feng1, 2, ZHANG Shu-quan1, 2, WANG Hua1, 2*, LI Jie1, 3, WANG Li1, 2, WANG Shu-hao1, 2, LIN Wen-jing1, 2, LIU Hong-li1, 2
1. Key Laboratory of Interface Science and Engineering in Advanced Materials(Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China 2. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China 3. College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Abstract：In the present paper, AlF3-YbF3∶Er3+ was prepared by high temperature solid phase reaction, and the concentration effect of Er3+ on luminous intensity of phosphors was studied. The crystal structures of the phosphors were characterized by means of X-ray diffraction (XRD), and the upconversion luminescence properties of phosphor were studied by fluorescence emission spectra. Upon 980 nm excitation, when the Er3+ concentration was fixed to be 0.7 mol％, the maximum red emission intensities can be obtained in the sample. Furthermore, the research results showed that the fitted slope for red transition emission was 2.24, indicating that red emission is due to a two-photon excitation process.
Key words：Upconversion;Er3+;High-temperature solid-phase method(Received Dec. 13;2011;accepted Mar. 20;2012)
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