Blue luminescence at room temperature in defective MgO films

被引：26
|
作者：
Martinez-Boubeta, C. [1 ,2 ]
Martinez, A. [1 ,2 ]
Hernandez, S. [1 ,2 ]
Pellegrino, P. [1 ,2 ]
Antony, A. [3 ]
Bertomeu, J. [3 ]
Balcells, Ll [4 ]
Konstantinovic, Z. [4 ]
Martinez, B. [4 ]
机构：
[1] Univ Barcelona, IN2UB, E-08028 Barcelona, Spain
[2] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain
[3] Univ Barcelona, Dept Fis Aplicada & Opt, Grp Energia Solar, E-08028 Barcelona, Spain
[4] Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Spain
来源：
SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 10期
关键词：
Thin films; Point defects; Electronic states; Luminescence; MAGNETIC SEMICONDUCTORS; MAGNESIUM-OXIDE; PHOTOLUMINESCENCE; IONS;
D O I：
10.1016/j.ssc.2011.03.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Luminescence spectroscopy has been used to characterize MgO films prepared by rf-sputtering. A clear correlation is found between the appearance of an emission peak centered at approximately 460 nm and the detection of ferromagnetic ordering in the samples. We suggest that cationic vacancies are responsible for the blue-light emission by introducing p states into the electronic band-gap. In accordance with this, our results strongly indicate that cationic vacancies are at the heart of the appearance of long-range magnetic ordering in MgO films. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：751 / 753
页数：3
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