Вышедшие номера
Ground state measurement of Pr3+ in Y2O3 by photoconductivity
Jia Dongdong1, Wang Xiao-jun2,3, Yen W.M.
1Department of Geology and Physics, Lock Haven University, PA Lock Haven, USA
2Department of Physics, Georgia Southern University, GA Statesboro, USA
3Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
Выставление онлайн: 20 августа 2008 г.

1 at.% Pr3+ doped Y2O3 single crystal fiber is prepared unsing a laser beated pedestal growth method. Emission and excitation spectra of the fiber have been measured. The emissions of 1D2 to 3H4 and 1D2 to 3H5 4f-4f transitions are found at 620 and 720 nm, respectively. The 3P2, 3P1, 1I6 and 3P0, 4f-4f absorptions are observed at 456, 472, 482 and 492 nm respectively. The 4f-5d absorption band is detected at 288 nm. Photoconductivity result shows that the 4f-5d transition of Pr3+ produces a direct photocurrent around 285 nm. Taking the onset photocurrent at 320 nm, the ground state of Pr3+ is determined at 1.7 eV above the valense band of the host. One of the authors (X.J.W.) is grateful for the support by the MOST of China (2006CB601104, 2006AA03A138) and the National Natural Science Foundation of China (10574128). PACS: 72.40.+w, 71.55.Ht
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