Mechanism of upconversion emission enhancement in Y3Al5O12:Er3+/Li+ powders
来源期刊：Journal of Rare Earths2011年第11期
论文作者：杨明珠 隋郁 牟海维 吕树臣 王先杰 吕天全
文章页码：1022 - 1025
摘 要：Er3+ and Li+ codoped Y3Al5O12（YAG） powders were prepared for a systematic investigation of their upconversion emissions.X-ray diffraction（XRD）,upconversion emission spectra,pump power dependence,FT-IR spectra and decay time were studied to characterize the samples.With Li+ doping,the upconversion emission intensity of Er3+ doped YAG powders was obviously enhanced,accompanied with an increase in the ratio of green to red intensity.The enhancement of emission intensity could be attributed to two mechanisms:one was the distortion of local crystal field around Er3+,and the other was the decrease in the amount of CO32-and OH-groups.Our results revealed that the latter was the dominant mechanism of the upconversion intensity enhancement in the YAG:Er3+/Li+ powders.
杨明珠1,2，隋郁2,3，牟海维1，吕树臣4，王先杰2，吕天全2
1. College of Electronic Science,Northeast Petroleum University2. Center for Condensed Matter Science and Technology(CCMST),Department of Physics,Harbin Institute of Technology3. International Center for Materials Physics,Academia Sinica4. Department of Physics,Harbin Normal University
摘 要：Er3+ and Li+ codoped Y3Al5O12（YAG） powders were prepared for a systematic investigation of their upconversion emissions.X-ray diffraction（XRD）,upconversion emission spectra,pump power dependence,FT-IR spectra and decay time were studied to characterize the samples.With Li+ doping,the upconversion emission intensity of Er3+ doped YAG powders was obviously enhanced,accompanied with an increase in the ratio of green to red intensity.The enhancement of emission intensity could be attributed to two mechanisms:one was the distortion of local crystal field around Er3+,and the other was the decrease in the amount of CO32-and OH-groups.Our results revealed that the latter was the dominant mechanism of the upconversion intensity enhancement in the YAG:Er3+/Li+ powders.
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