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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Spectroscopic properties of vacancies and trap levels in
 Lu3Al5O12׃Ce3+ crystals
ZHONG Jiu-ping(钟玖平)1, LIANG Hong-bin(梁宏斌)1, SU Qiang(苏 锵)1,
ZHOU Jian-ying(周建英)1, WANG Ji-yang(王继扬)2

1. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University,
Guangzhou 510275, China;
2. State Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100, China

Abstract:In order to study the spectroscopic properties of vacancies and trap levels in Lu3Al5O12׃Ce3+ (LuAG׃Ce3+) crystal, the <111>-oriented LuAG׃Ce3+ crystal grown in pure nitrogen atmosphere by Czochralski method was annealed in oxidizing atmosphere (air) and reducing atmosphere (H2+N2), respectively. The excitation and emission spectra of LuAG׃Ce3+ crystal after different thermal annealing treatments were measured in the temperature range of 8−450 K, and the thermally stimulated luminescence curves of LuAG׃Ce3+ crystal were characterized. It is found that the oxygen vacancies in LuAG׃Ce3+ crystal are effectively eliminated through the annealing treatment in air and four trap levels are observed in as-grown LuAG׃Ce3+ crystal with temperature position peaking at 110, 210, 325 and 475 ℃, respectively.

 

Key words: Lu3Al5O12׃Ce3+ crystal; oxygen vacancy; thermoluminescence

ISSN 1672-7029
CN 43-1423/U

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