The Influence of Oxygen Vacancies on Luminescence Properties of Na3LuSi3O9:Ce3+

详细信息    查看全文

• 作者：Jianbang Zhou ; Jiuping Zhong ; Jingyuan Guo ; Hongbin Liang ; Qiang Su ; Qiang Tang ; Ye Tao ; Federico Moretti ; Kheirreddine Lebbou ; Christophe Dujardin
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：August 25, 2016
• 年：2016
• 卷：120
• 期：33
• 页码：18741-18747
• 全文大小：507K
• 年卷期：0
• ISSN：1932-7455

文摘

Oxygen vacancies play an important role in the luminescence processes of inorganic scintillator materials. In order to study the effects of oxygen vacancies on the luminescence properties of Na₃LuSi₃O₉:Ce³⁺, these phosphors were prepared using a high temperature solid-state reaction method under different atmosphere and raw materials. It was found that oxygen vacancy had great influence on the absorption, photoluminescence and decay curves of Na₃LuSi₃O₉:Ce³⁺. The luminescence intensity and peak position showed a regular change when synthesizing atmosphere changed. Na₃LuSi₃O₉:Ce³⁺ with more oxygen vacancies showed much stronger luminescence intensity at high temperature than that without vacancies. And it was also found that the decreasing of oxygen vacancies can quicken the photoluminescence decay of Ce³⁺ in Na₃LuSi₃O₉. The existence of oxygen vacancies in Na₃LuSi₃O₉:Ce³⁺ was confirmed by Zr⁴⁺ doping and thermoluminescence emission spectra. At last, emission bands of Ce³⁺ and oxygen vacancies were well distinguished under X-ray excitation and probable cause of the formation of oxygen vacancies was discussed.