Research on the Relationship between Surface Structure and Fluorescence Intensity of Ca(1-x)Al2Si2O8∶Eux
HE Xiao1,3, ZHANG Li-sheng2, ZU En-dong1*, YANG Xiao-yun3, DONG Kun3
1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 2. Nano Optoelectronics Key Laboratory of Beijing, Capital Normal University, Beijing 100048, China 3. Research Center of Analyze and Testing, Kunming University of Science and Technology, Kunming 650093, China
Abstract：Ca(1-x)Al2Si2O8∶Eu<i>x(x=0, 0.01, 0.05, 0.15) were synthesized by solid-state reaction respectively at 1 150, 1 250 1 350 and 1 450 ℃. With X-ray diffraction(XRD), Raman spectroscopy(Raman), photoluminescence spectroscopy(PL) and X-ray fluorescence spectrometer(XRF), the relationship between surface structure and fluorescence intensity of Ca(1-x)Al2Si2O8∶Eux were studied. XRD and Raman results show that, CaAl2Si2O8 anorthite single-phase has formed gradually along with the temperature rising in the process of synthesis.Raman spectroscopy is clear that when the Eu doping amount is the same, Si—O amorphous phase disappear gradually and the CaAl2Si2O8 phase form gradually with the temperature increases. As the temperature increases, vibration peaks position silicon oxygen tetrahedron shift to lower wave number. When 1 450 ℃, the temperature is too high to destroy the structure of silicon oxygen tetrahedron.At the same time, there is a broadening amorphous peak appears in Raman spectroscopy.The procedure of Al to replace Si is hindered with Eu doped in. It is the result that the peak at 1 620 cm-1 decreases after the first increases. The change of surface structure associated with the scattering amount of Eu. PL and XRF results show that: as the temperature increases, the amount of Eu atom scattering on the material surface increases gradually, this change lead to the fluorescence intensity raise. Therefore, there is proportional relationship between the fluorescence intensity of the samples and the number of samples per unit surface area of Eu atoms.
贺 晓1, 3，张利胜2，祖恩东1*，杨晓云3，董 鹍3 . Ca(1-x)Al2Si2O8∶Eux表面结构与荧光强度相互关系的研究 [J]. 光谱学与光谱分析, 2016, 36(01): 146-150.
HE Xiao1,3, ZHANG Li-sheng2, ZU En-dong1*, YANG Xiao-yun3, DONG Kun3 . Research on the Relationship between Surface Structure and Fluorescence Intensity of Ca(1-x)Al2Si2O8∶Eux . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 146-150.
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