ФТТ, 2008, том 50, выпуск 9: page 1610...

ФТТ, 2008, том 50, выпуск 9

Содержание	Предыдущая статья	Следующая статья	Поиск

Ground state measurement of Pr³⁺ in Y₂O₃ by photoconductivity

DongdongJia^\kern1pt*, Xiao-junWang^{\kern1pt**,***}, W.M.Yen^\kern1pt****

^* Department of Geology and Physics, Lock Haven University,
PA 17745 Lock Haven, USA
^** Department of Physics, Georgia Southern University,
GA 30460 Statesboro, USA
^*** Key Laboratory of Excited State Processes, Changchun Institute of Optics,
Fine Mechanics and Physics, Chinese Academy of Sciences,
130033 Changchun, China
^**** Department of Physics and Astronomy, University of Georgia,
GA 30602 Athens, USA
E-mail: xwang@georgiasouthern.edu

1 at.% Pr

³⁺ doped Y

₂O

₃ 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 Pr

³⁺ produces a direct photocurrent around 285 nm. Taking the onset photocurrent at 320 nm, the ground state of Pr

³⁺ 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

PDF версия (199Kb) Другие выпуски Другие журналы Помощь

Copyright (C) 2008, Коллектив авторов Разработано... webmaster