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中文摘要：
采用高温固相法制备了AlF3-YbF3∶Er3＋上转换荧光粉,分析了Er3＋掺杂浓度对其发光强度的影响。通过X-ray diffraction（XRD）对样品物相分析。利用荧光发射光谱研究了该荧光粉的上转换发光性能,进而提出其上转换能量传递机理,研究结果表明：在980nm半导体激光器激发下,以AlF3-YbF3为基质,当Er3＋的掺杂浓度为0.7mol%时,该荧光粉的红光发射强度最强;通过上转换发光强度与泵浦电流关系曲线的拟合,表明AlF3-YbF3∶Er3＋上转换荧光粉的红光上转换过程为双光子过程。
英文摘要：
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.
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