Effect of Europium Valence on the Luminescent Properties of Sr2MgSi2O7:Eu

被引：5
|
作者：
Wu Hao-Yi [1 ]
Hu Yi-Hua [1 ]
Chen Li [1 ]
Wang Xiao-Juan [1 ]
机构：
[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2011年 / 27卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Long afterglow; Lattice defect; Valence change; PERSISTENT LUMINESCENCE; PHOSPHORS; EU2+; DY3+; REDUCTION; EU3+; MECHANISM; RE3+; AIR;
D O I：
10.3866/PKU.WHXB20110523
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Sr1.99MgSi2O7:Eu-0.01 samples were prepared in four steps under air, a reducing atmosphere, air again, and a reducing atmosphere again. The samples prepared in air showed both Eu2+ and Eu3+ emission while the samples prepared in a reducing atmosphere showed Eu2+ emission with a long afterglow and two thermoluminescence (TL) bands. However, only one TL band was observed for the sample prepared directly in the reducing atmosphere. Hole traps were created during the synthesis in air and were preserved during the reducing synthesis. These hole traps are different from the electron traps created by a reducing atmosphere. The hole traps and the electron traps result in two TL bands.
引用
收藏
页码：1201 / 1206
页数：6
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