1.The Institute of Chemical Physics, Beijing Institute of Technology, Beijing 100081, China 2.Baotou Research Institute of Rare Earth, Baotou 014030，China 3.Laboratory of Beijing Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
Abstract：The (Sr, Ba)Al12O19∶RE3+(RE=Ce, Tb) compounds have been synthesized by the solid state reaction technology.The single-phase magnetoplumbite-type crystal structure has been identified by the X-ray diffraction analysis.The 302 nm peak and ～340 nm not-clear shoulder are correspondence to the 5d→2F5/2 and 5d→2F7/2 transitions in the emission spectrum, respectively.The 158 nm peak and 260 nm peak are separately contributed to the host absorption and 4f-5d transition of Ce3+ in the excitation spectrum.The characteristic emission of 5D3→7Fj(j=2，3，4，5)and 5D4→7Fj(j=4，5，6)transitions in the range of 400-600 nm are assigned in the emission spectrum of (Sr，Ba)Al12O19∶Tb3+0.05.The ～160 nm peaks arises from the overlap of the Tb3+-O2- charge transfer band and the host absorption.The 193 nm and 233 nm peaks are attributed by the spin-allowed 4f-5d transition and the spin-forbidden transition, respectively.The overlap between the emission of Ce3+ and the f-f transition absorption of Tb3+ exists in the (Sr，Ba)Al12O19∶Tb3+, Ce3+ compounds.The luminescence intensity of Tb3+ increases with the increase of the Ce3+ ion concentration.When the Ce3+ ion concentration reaches about 0.03 mole, the luminescence intensity of Tb3+ ion is nearly two times comparing with the non-codoping Ce3+ ion compounds.When the emission wavelength is 543 nm, the excitation spectra exhibit the 4f-5d absorption of Ce3+ besides the host absorption and 4f-5d transitions of Tb3+ in the (Sr，Ba)Al12O19∶Tb3+, Ce3+ compounds.According to the excitation spectrum, the part of the emission of Tb3+ comes from the absorption of Ce3+ ion.Therefore, it is illustrated that the Ce3+→Tb3+ energy transfer has been existed in the (Sr, Ba)Al12O19∶RE3+(RE=Ce, Tb) compounds.
Key words：(Sr;Ba)Al12O17;Ce3+ and Tb3+;VUV;Energy Transfer
张忠义1,2, 张韫宏1*, 李晓丽2,沈雷军2,韩莉2,周永勃2,徐建华3, 黄艳3. (Sr,Ba)Al12O19∶RE3+(RE=Ce, Tb)的VUV发光及Ce3+→Tb3+的能量传递[J]. 光谱学与光谱分析, 2008, 28(08): 1737-1740.
ZHANG Zhong-yi1, 2,ZHANG Yun-hong1*,LI Xiao-li2,SHEN Lei-jun2,HAN Li2,ZHOU Yong-bo2,XU Jian-hua3,HUANG Yan3. The VUV Luminescence Properties and the Ce3+→Tb3+ Energy Transfer in the (Sr, Ba)Al12O19. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(08): 1737-1740.
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