3+ i+Mechanism of upconversion emission enhancement in Y3Al5O12:Er /Li powders

稀土学报(英文版), 2011, 29(11): 1022-1025. doi: 10.1016/S1002-0721(10)60590-X

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.College of Electronic Science, Northeast Petroleum University, Daqing 163000, China;Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China

2.Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China;International Center for Materials Physics, Academia Sinica, Shenyang 110015, China

3.College of Electronic Science, Northeast Petroleum University, Daqing 163000, China

4.Department of Physics, Harbin Normal University, Harbin 150001, China

5.Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China

6.Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China

基金项目: the Fundamental Research Funds for the Central Universities(HIT.NSRIF.2009056) the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry the National Natural Science Foundation of China(50672019;10804024)

3+ i+Mechanism of upconversion emission enhancement in Y3Al5O12:Er /Li powders

YANG Mingzhu ^1, , SUI Yu ^2, , MU Haiwei ^3, , Lü Shuchen ^4, , WANG Xianjie ^5, , LüTianquan ^6,

3.College of Electronic Science, Northeast Petroleum University, Daqing 163000, China

4.Department of Physics, Harbin Normal University, Harbin 150001, China

5.Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China

6.Center for Condensed Matter Science and Technology(CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Keywords： luminescence

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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3+ i+Mechanism of upconversion emission enhancement in Y3Al5O12:Er /Li powders

参考文献