Annealing effects on Czochralski grown Lu2Si2O7:Ce3+ crystals under different atmospheres

Cerium-doped lutetium pyrosilicate Lu2Si2O7:Ce3+ (LPS:Ce) single crystal samples grown via Czochralski method were annealed under air and H2 atmospheres from 350to1600°C. The x-ray excited luminescence spectra and UV as well as thermal stimulated luminescence spectra were measured. It was found that...

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Bibliographic Details
Published in:Journal of applied physics 2008-04, Vol.103 (8)
Main Authors: Feng, He, Ding, Dongzhou, Li, Huanying, Lu, Sheng, Pan, Shangke, Chen, Xiaofeng, Ren, Guohao
Format: Article
Language:English
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Summary:Cerium-doped lutetium pyrosilicate Lu2Si2O7:Ce3+ (LPS:Ce) single crystal samples grown via Czochralski method were annealed under air and H2 atmospheres from 350to1600°C. The x-ray excited luminescence spectra and UV as well as thermal stimulated luminescence spectra were measured. It was found that the luminescence efficiency after annealing in air at 1400°C was significantly enhanced compared to the unannealed samples. This phenomenon was suggested to be caused by the existence of some oxygen vacancies in the LPS:Ce crystals, and these oxygen vacancies can be effectively eliminated by means of annealing in air. Although the annealing will lead to the oxidization of cerium ions from Ce3+ ions to Ce4+, which is harmful to the luminescent efficiency, the annealing treatment does enhance the luminescent efficiency of LPS:Ce, without changing its luminescence mechanics.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2906348