Optical absorption of a Li-related impurity in ZnO

A defect associated with Li in ZnO is reported. This is an optical system which absorbs strongly in the red part of the spectrum: a doublet, the zero phonon lines are at 1.884 and 1.879eV, respectively. The chemical nature of the centre is identified through isotope substitution. This is the first o...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2003-12, Vol.340-342, p.225-229
Main Authors: Mc Cabe, Deirdre, Johnston, Karl, Henry, Martin O., Glynn, Enda Mc, Alves, Eduardo, Davies, J.John
Format: Article
Language:English
Subjects:
Absorption
Isotope substitution
Magnetic resonance
Photoluminescence
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Summary:A defect associated with Li in ZnO is reported. This is an optical system which absorbs strongly in the red part of the spectrum: a doublet, the zero phonon lines are at 1.884 and 1.879eV, respectively. The chemical nature of the centre is identified through isotope substitution. This is the first observation of sharp optical features involving Li in ZnO. Although there are similarities to a Li EPR centre, we cannot yet correlate the optical centre. Similiarities to a previously attributed system involving Ni are discussed.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2003.09.020