Photoionization of cobalt impurities in zinc oxide

被引:2
|
作者
Ivanov, Vitalii Yu. [1 ]
Godlewski, Marek [1 ,2 ]
Dejneka, Alexander [3 ]
机构
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[2] Cardinal S Wyszynski Univ, Coll Sci, Dept Math & Nat Sci, PL-01815 Warsaw, Poland
[3] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
来源
关键词
absorption band; cobalt; electron spin resonance; photoionization; pulsed mode; ZnO; MAGNETIC-PROPERTIES; ZNO; CO; SEMICONDUCTOR; ELECTRODES; TRANSITION; STATES;
D O I
10.1002/pssb.201451496
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Electron Spin Resonance investigations allow to attribute a broad absorption band below the band-to-band transition of ZnO:Co to photoionization transitions of Co-ions. This absorption, with the onset at about 2.4-2.6eV, is due to cobalt recharging, as concluded from the photo-ESR and pulsed ESR experiments. In these experiments light sensitive ESR signals of Co2+ and shallow donor are observed. Their response to light favors cobalt 2+ to 3+ photoionization.
引用
收藏
页码:1988 / 1992
页数:5
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